The floating little comic relief robot sidekick almost kills said atmosphere. It would feel a LOT (and I really mean LOT LOT LOT) better, desolate and depressing if I didn't have to listen to a snarky remark each time I'm doing just about ANYTHING. It's like a post-apo Jar Jar, wtf.
Well, there's no arguing about taste -- what people dislike, they dislike. I don't really think the Jar-Jar comparison is apt, though, since the criticisms of Jar-Jar (as I understood it) wasn't just that he was inappropriate to the mood (was he, really? the whole movie was ridiculous) so much as (1) his Steppin Fetchit brand of humor was offensive and targeted at a totally different age group as the rest of the movie and (2) the entire Gungan concept didn't fit at all with the setting they were building, not from a mood standpoint, but from an internal coherence standpoint. If the movies had had Chris Rock doing his thing as Lando Calrissian's dad, there still would've been inappropriate humor, but I'm not sure people would've had the same viscerally negative reaction.
That said, I'm not trying to say you're wrong. Everyone is right when they are talking about their own reaction to something, positive or negative. I just don't want people to get the wrong idea of what
kind of comic relief Crispin is providing.
In any event, while I agree the game's mood would've been a lot more desolate and depressing without Crispin, his inclusion was deliberate to make the game
less desolate and depressing. Gloominess is not the be-all and end-all. Morte obviously makes the mortuary sequence much more ridiculous and much less macabre, but I don't think PS:T would've been better if it had started with two hours of TNO growling at things.
Still, again, defensiveness aside, I'm not trying to quarrel with your criticism!
--EDIT--
I should add, obviously if you don't find Crispin funny, then he's not providing comic relief, he's just being annoying. If he's not funny, that's just an outright failure on my part, as opposed to a philosophical decision not to go full grimdark.