I quit a few months ago because we were on different pages. The guitarist and I wanted to be a "dual band", a function band band in hotel lounges and bars, and an originals band in local scene bars. The singer had no desire to work in a function band, but wasn't very convincing about willing to prepar original material at home too. The drummer said he would follow what the band decides but his networking skills are zero. Besides he and the guitarist had a personal issue going on. Additionally, drummer and singer weren't doing their homework properly lately.
As it was a "democratic" band and I had no right to fire anybody, I decided to quit. The band broke in a couple days. Now, the guitarist and I run a semi -acoustic project.
tl; dr
People without similar goals or willing to put effort