Firstly: Your snide tone isn't helpful. At all. It is, in fact, very likely to result in cross words exchanged. Being respectful of others is in the rules. Maybe give it a shot, instead of doing what you did here.
Secondly: That's quite different, though (as noted above) yeah, sometimes getting whatever random (or, often, """random,""" because the DM feels like putting it in there) treasure...doesn't really do anything for me and I won't really hold onto it. Because it's simply not as good as sticking with what I've got. Even though the thing in question, like a flame tongue longsword, is a "major tier" "rare" item worth (apparently) 4000 gp, it literally can be inferior to a perfectly mundane greatsword. I don't see this as being ungrateful, I see it as being pragmatic; let someone else have the cool sword, even though it'll probably be super obvious that it was intended for my Barbarian (or whatever), because it just doesn't do anything for me.
I welcome some amount of surprise. Again, your snide, snippy attitude doesn't reflect well on your point here, which is (I presume) that you think people should be more open to spontaneity and unexpected results. But there's a pretty high likelihood I'm going to pass on items that aren't actually worthwhile for the kind of training my character has gone through. Like I said, I don't see that as being ungrateful or petulant, I see it as a matter of pragmatism: if the item is, in fact, a reduction in utility for me, it not only can but should go to someone else for whom it will have positive utility, even if that utility is marginal.
Now, if you'd like to actually have a conversation instead of being mocking and insincere, that could actually be interesting.