Everyone has good suggestions. It sounds like everyone wants this drummer out of the band because the chemistry isn't quite there, but no one wants to be the "bad guy." Sometimes, you have to play "bad cop." If someone isn't cutting it in the band, you either gotta let them go, drama be damned; or work with them if they're willing to improve. Unfortunately, that could take a while. I'm currently the crummiest musician in my band and our drummer had to invest more time than he'd have liked getting me up to snuff, but the reason I'm still in the band is because I want to improve, I put in the effort to improve, and I'm reliable/pull my weight. My band's had several lineup changes (I'm currently bassist #3), so our poor drummer's had to play "bad cop" a lot because he's not afraid to speak his mind and be forthright, and he wants that from everyone in the band so the band can get to brass tacks right away without the b.s. and move forward.
My cousin's facing a similar dilemma. He's in a band where the drummer is brilliant with his hands (he played quads in drum corps) but has two left feet, and that kills the chemistry with him and the guitarist. Unfortunately, the drummer and the guitarist are brothers. I don't know what their situation is now.
My other friend's band had to let their drummer go (this is the 3rd band this drummer's been ousted from). He has skill, but his timing isn't always on point because he doesn't practice much. My friend offered to let the guy borrow his electronic drumkit so he could practice with headphones without disturbing anyone, but he said "nah, man, that ain't my kit" which IMO is a flimsy excuse. So I feel like in this case, a golden egg solution was offered, but the guy wasn't willing to make the sacrifice to improve.