On your second paragraph, 100% not. You are spot on (which ties into my point in this entire thread, you've only picked up on my last post which is a result of trolling from Chatsu).
We should always aim (club/players/manager) and hope (us) to win everything we're a part of, but as supporters, we also need to be realistic with our expectations and judge the team accordingly. Just because we want our team to win the UEFA Cup that doesn't mean it's realistic and it also doesn't mean we should judge them as if it was realistic.
The OP said we're undermining our tradition of success because people are satisfied with the progress we've shown in Europe while still being disappointed at being put out. It's a lot of shîte.
Our expectations and parameters for success need to change along with the squad we have in front of us. We did very well to go as far as we did for the quality we possess along with a lot of other mitigating factors – but supporters are to be told they're 'undermining traditions' by acknowledging and commending the squad even though we didn't win the tournament?
I suppose where our opinions may diverge is that I don't think the harm is in us having unrealistic demands or expectations, I think it's in the board, manager and players' collective ability to handle them, even use them to drive for greater achievement.
We can obviously look at years gone by and compare the teams and the money and think we have to adapt our expectations.
However, I'd perhaps suggest that even in some of those days we were ultimately in the same position and going up against teams with far greater resources than us, who we were probably on paper going to get cuffed by. But we had a different mentality going in. We had belief and we had winners throughout the team and club, so we approached the games with a different mindset. Results might still not have gone our way, but the character of the team didn't shirk the howls of derision, it grew because of them.
You listen to former players like KT and RG and others talking about the pressure and the lack of room for error as a player "only as good as your next pass" - they loved it, they craved it, they miss it.
While the current team may be facing bigger financial gulfs than those guys did, the principle is the same really and what we lack is that character and mentality. IMHO.
There's a lot of footballing talent there, we see it in spates. But the heart?
I think the fans need to remain true to what we've always been and keep those demands at that level. No matter how unrealistic they may be at times, because ultimately that's how we'll find the players who have what it really takes if we're ever going to get back to the winning ways we had before.
Just my two cents.