People would have happily accepted the big defeat if we were playing the same football we did early on, but on a regular basis. The week to week quality of the football we're playing has been average to poor, despite one game a week and having an almost entirely fit squad of late.
It is mostly not enjoyable. So when you combine that with getting whipped 4-0 by an injury struck Newcastle team who have Emile Krafth and Elliot Anderson starting for them, the fanbase naturally aren't very happy. Shock.
And therein lies a massive flaw in your expectations, if you suffer a "big defeat" it's not going to coexist with the same kind (any kind) of decent football on show that you speak of, that's simply an impossibility (those type of games we HAVE seen namely when Villa beat us at Home, same with West Ham at home two games where we where by far and away the better side but lost, that's what those games look like and people lost their shit after these games, not me because I thought we played well and were the better side). Can you give ONE, just ONE example of a team playing a fantastic, enjoyable brand of football whilst they are getting pumped +4-0? I'll wait.
What was said when Klopp's Liverpool got pumped 7-2 by Villa, or 3-0 by Watford TWICE, or 4-0 by City TWICE, and then a 5-0 also, and us spanking them 4-0 too, there have been others by Brighton and Napoli and Barca too.
I've used Klopp's Liverpool because I think Angeball is the closest style of football to Klopp's. Both are massive high-risk approaches to each game, but from what I've seen Ange's football is even more high-risk than Klopp's.
The narrative early on is many of us who studied Ange to gain an understanding of what to expect at Spurs was one very common theme and that's during his first season we can expect a shellacking along the way whilst the team get to grips with his demands. Not a narrow loss but a complete tonking because of how he sets up.
What happened at Newcastle was a team that identified really, really well how to beat us. In essence, nullify our attack with a low block, but also press us high and aggressively by going man to man. Other teams (Everton x2, Brentford and Forrest) have also attempted to do this but haven't pulled it off.
Ange is NOT changing how we play/set-up, even if the team is not equipped with the personnel he needs to do it. He's not tweaking how we play based on who the oppo is (there will be obvious game-to-game strategies but not how we approach the game, this is fixed).
We play with two centre-backs and one sitting midfielder. It requires a strong "rest defence", so Son, Kulu, Brennan, Werner, or whoever is playing up top needs to win the ball back quickly if they lose it. Failure to do this means we are vulnerable.
So sorry your expectation is bollocks (but you know what, the ONLY example I can think of is us vs Chelsea, where we clapped our team off the pitch).