Well the math ain't mathing because your definition of young is off. 6 out the 9 you mention are absolutely within the definition - you're pretending as if being young is confined to being a teenager.
But my friend I'm going by your own definition because you said this:
Do you really expect anyone to believe Levy looked at last season where Ange awarded a whooping 7 mins to our academy players (the worst in the league obviously) and thought to himself, let me flood the squad with 18 year olds because the manager has clearly shown he's magic with the yout dem

I'm sorry unless I'm mistaken you are citing project yout dem as and cited 18 year olds being in the team and you're citing our academy players who are in fact...teens so I think you need to pick an argument here and just stick with it.
Regardless
The literal definition of young is totally subjective regardless so we'll be here all day arguing about it so it's a bit pointless going back and forth, my point is though that we aren't flooding the squad exclusively with teens which would be the easy thing to do if your the board who are just looking purely for value and a sure fire way to throw a manager under the bus, as far as I'm concerned that isn't happening, let's be fair in our judgements.
Furthermore, Werner is ON LOAN, he's not a long term squad investment. Vicaro is a goal keeper - that is a position which is always resvered for experience, are you kidding me? It's extremely rare to get a super young goal keeper. Maddison was a complete no brainer transfer which was never predicated on his age. Playermakers (a position we've lacked since Eriksen left) rely on experience on reading the game and he was one of the most experienced PL playmaker and his club were just relegated. That was a Levy deal come hell or high water, let's not forget we were tracking Maddison years prior back in his Coventry days. Why list numbers without context...
Okay you can have Werner and Vicario fine but I'm not having the rest of your mental gymnastics, sorry.
Maddison being a 'complete no brainer' due to him being a playmaker of his age is a load of nonsense and you know it, the bottom line is you can protest and give me all these desperate excuses all you want at the end of the day we signed a player in his prime, if not coming into his prime at 26 years of age - we also made him our 2nd highest paid player and out vice captain...so much for project 'yout dem' hey...
Sure, let’s pretend we didn’t have a defensive injury crisis and went to the extent of playing a shit right back in Emerson Royal as center back (and DIRECTLY paying for that decision multiple times) whilst Ashley Philips was sat on the bench receiving zero minutes. Royal being so shit he was eventually sold yet in your world there were no opportunities to even accept the risk was worth giving a Phillips, a player we fucking paid cash for, a chance.
Eh? What does this have to do with the price of fish lmao
Re-defining what it means to be backed doesn't mean the man is being backed. He is operating within his parameters i.e. he has been briefed on the strategy and the player profile and he is making decisions based on those limitations, which are significant limitations. Putting a toddler in the confines of a play-pen and dropping in a choice of toys is not free rein. Absolutely both manager and club can be tracking a player and stars align i.e. Bergwin under Mourinho (re-watch the amazon doc episode if you want). This is very different from a manager identifying a player first and convincing the club.
As is every manager in the Premier League and the vast majority of clubs in world football, welcome to the real world.
Like every manager for the most part don't get to pick their players mate, this isn't the 90s anymore they're not going out there and picking players themselves...the way football clubs operate particularly within a DOF structure they will have a philosophy that operates within a certain means and will hire a manager to fit that exact philosophy , that's literally how it's meant to work hence why we bought in Lange to maintain those standards and work the coach on what type of player he wants.
And not even the likes of Klopp or Arteta had that sort of autonomy on players until they could be
trusted, they only really got to start picking their own players when they were in after a certain amount of time anyway, you ever hear the story of Klopp wanting Julian Brandt and Michael Edwards choosing Salah over him and they fell out? Klopp didn't choose Van Dijk or Allison by the way - that was all Edwards...in fact the moment that Edwards left Liverpool gave Klopp autonomy and they bought in duds like Nunez and Gakpo and started to plateau, go figure...
Many people on here have said we're going through what the Arse did with Arteta, but we're not. Arteta is a perfect example of what being backed means. His club came out and directly told decenting fans to shut the fuck up and let him cook whilst he he was struggling - 8th, 8th and 5th. Levy will never utter a single word in defence of his manager, he will always choose to hold the card to throw a manager under the bus. The only time you hear from Levy is once a manager has been future endeavored and the obligatory "we've lost our way" club statement subtle dig comes out. Arteta hand picked rice for 100 mill, that's backing, he hand picked Havertz despite being relentlessly mocked by the media for showing any interest in the first place. Arteta believed he could mould him despite the glaringly obvious need for a out and out center forward. The club trusted the decision. That is a manager being backed.
Arteta? Haha The guy literally missed out on his first choice targets in Caicedo, Mudryk, Zubimendi, Buendia and Mason Mount - what are you talking about?

And like I said before comparing us to Arse and Arteta to Ange is such a massive false equivalence anyway:
Before the Rice transfer Arteta had to
prove to his club that he could firstly improve his players which he did therefore he has bought value directly back into the club...like for example if Arse were to sell Saka, Saliba and Martinelli they could legit ask for over £200m.
Also Arse have shown gradual improvement every season and he had them in a title challenge - basically he has gained trust from his bosses...like he would never have been able to get Rice in his 2nd season which Ange is in now, he's in year 4 so until Ange can prove the above which he needs to he isn't going to get that sort of autonomy and backing regardless.