Which is why they should be celebrating. Qualifying for the ECL gives them the best chance they're going to have to actually win a trophy. They'll never win the PL or CL. The FA Cup is extremely unlikely now. The LC is unlikely, but maybe they fluke it one year. The EL is on the fringe of possibility, but it'll be tough. They'll be one of the favourites for the ECL.
Villa aren't Spurs. If we feel like we're under a mountain trying to win trophies, it's exponentially harder on them. Best season in 13 years, back and Europe, with a chance to win a trophy after being in the Championship a couple seasons ago? They have every right to be happy. And, like I said, a player should never be slagging off his own supporters on social media for celebrating.