I had a similar scenario when i met a rhyth guitarist who, after few chats and and some weeks had gone by, suddenly asked me to join his band cos the bass man had moved to the wilds of Dorset
I did, and after a few rehearsals, i knew they weren't for me. I'm no Karn or Jones but the lead guitarist was pants. He did this kinda shredding ' look at how fast i can play ' over just about every track, whether it needed it or not. I used to wince inside every time. The drummer never, i mean never used his hi-hats. They were permanently closed. And he was a shed builder that couldnt keep time.
The singer thought he was special but was the exact opposite.
I quit. There was no way i was going to gig with this motly crew. So instead of wasting their time and mine, i did the decent thing