@LBS-bass .. not sure if we're in the exact same position but I also have decades (5!

geez!) of solid professional gigging/performing/recording experience, and have been retired from full time working demands for the past 4 years. Also, while I don't generally play small money, money is not my main priority so that frees me up to focus on the gigs/projects that have the greatest potential for musical satisfaction/fun.
I
always do my homework and am prepared for rehearsals and performances. I always did this, but it's certainly got easier now that I a retired from any day-to-day/week-to-week working demands. I (pretty much) always prioritize gigs based on which needs the most of my attention. I also fill a MD role often in bands .. mostly because I have the general musical experience/skills (i.e. not just a bass player) and others can't or won't, or don't really have enough broad musical experience and the maturity/reliability to do so.
So. similar maybe.
While I try not to be critical with other musicians (after all, it is supposed to be fun) I also do not easily suffer players who don't prepare/do their homework. I also try not to get into "rehearse to death" situations where players depend on endless jamming type rehearsals to get their s**t together. I try to be polite and professional about my interactions with other players, but I always try to set expectations with everyone up front and then I make a point to stick to my commitments.
Given what you described though, you may need to rethink how many projects your in and perhaps you may need to reduce your commit level to just those projects that are the most satisfying (and if you need the dough ... perhaps those with the best paying gigs ??).
personally, I'd rather do fewer, better organized and more satisfying gigs, than deal with a more crowded calendar but with less committed musicians. Its just more fun/satisfying for me that way.
good luck as you navigate this situation.