I don't either, if anything Buffy was usually the one telling other characters to suck it up! I don't even think that she complained about her powers all that much after high school (admittedly she did complain a fair bit in early season 2), yet some viewers seem to remember her treating her slayer powers as a burden nonstop?

And yes, Wesley seemed very stuck on being a chivalrous and old-fashioned gentleman, but most of the time I just wanted him to get over himself! Early on the show would make fun of how pompous and self-important he was, but by the time of dark Wesley I felt like we we were supposed to take the character as seriously as he took himself, and get really invested in his angsting and creepy worship of Fred