My experience of this is playing in an Americana outfit originally formed by a ukelele-playing music-in-the-community merchant.
She was very enthusiastic and did a lot of good, but she was a very limited musician and either couldn't or CBA to learn the songs properly.
Over a couple of years the band attracted some much better musicians because the song choices were a lot of fun, but each as they joined pretty much 'dumbed down' to her level.
Finally their long-term bassist left and I was recruited, and I don't do dumbing down. If it's a 5-chord song then I play five chords ... I don't leave out the funny ones in the bridge because someone hasn't learned those chords on a uke.
It didn't end well.
She got her boyfriend (guitar & banjo) to sack me, which he did very apologetically, then it turned out the rest of the band didn't know until it was too late and within a month both she and her boyfriend were out of the band and they had split up too.
I should stress that there are no villains in this piece. She wasn't evil, her boyfriend wasn't a silly billy, and I probably didn't help matters. But stinky poo happens.