I appreciate humour, even though I rarely laugh out loud. Sometimes I find humour in games is inappropriate, and sometimes I really want a game to be serious and it is not.
But BG1/2 set the tone for the series to include humour, so I expected it in BG3, and, in general, I feel the level in BG3 is fine. The wide audience means that the writing team cannot write niche, overly sophisticated humour, unless it seems normal prose when you don't understand the reference ( Terry Pratchett was a master at writing good prose that was only funny if you had a particular knowledge and world view ).
BG1/2 had some humour I really liked, but didn't really set the bar all that high with Noober and Jan Jansen. BG3 is certainly no worse than its predecessors, and has had me smiling at times.