Great TOPIC! From experience you need to be rid of the drummer and move on. Fire him. Trust me, he’ll never meet expectations. Here’s a story of my experiences.
The LAST 2 bands I was in I had a drummer issue. The cover band I was in,the drummer was a good friend but he was bad. Drummers are supposed to know at least some basic fundamental technically. He didn’t know how to count as he had to depend on the vocals and or the lead guitar to know his spot in the songs. The drummer of all people needs to be the one who knows how to count. For every regular paces rock n roll song. We’d do, we’d have to play 2 slower songs for him to catch his breathe. He literally would practice by taking his drum seat and sitting on it with his drum sticks,headphones on and f*cking air drum! AIR DRUM! 2 years later and he’s making the same mistakes as the 1st rehearsals. He acted like he wasn’t the issue and always argued with everyone else. As a bassist,it was impossible to lock in with him. I tried so many different ways and it’s just didn’t work. Looking back he should been GONE! That band was Bs and didn’t last anyway.
I was just recently in a GNR tribute project that went to hell after 5 months of rehearsal. Long story short, our band manager who was our lead guitarist a wife was baton the singer. A month away from our 1st gig and the band ended. Anyway! About the drummer. At the audition I He happened to audition the same time as me. He was NOTHING SPECIAL and made quite a few standnout mistakes. I remember leaving their after nailing the audition and thinking I hope I NEVER SEE THAT DRUMMER AGAIN! Well somehow he got the gig. This guy was even WORSE then the previous drummer of the band I was in. In GNR the rhythm section is every bit as important as Axls voice and slash’s guitar. Me,the lead guitarist and drummer would have separate rehearsals to help the drummer learn the songs. He had no musicianship AT ALL! No idea what counting was,couldn’t pickup a song from any point during the song. He literally had to learn a song from start to finish and if you wanted to extend a solo or improvise he’d get lost. 30 years of drumming and I’ve seen people at 1 year better then him.5 months of rehearsal and his audio orb was his best rehearsal. I hated him. Then it ALL CAME TO A BLOW AT OUR FINAL rehearsal. He was worse then ever . I was on his ass and finally he goes “ you wanna play drums.” “ you never missed a beat.” Everyone messes up but there’s a difference between messing up and not knowing *** you’re doing! For 3 1/2 months o told the manager we needed a new drummer. Her husband even told her. She wouldn’t replace him. Probably was banging him too. Point is, fire him. It’s not worth it man.