Every client of mine uses different communication, design, and project management tools. I spend so much time switching between accounts, and figuring out where the hell everything is.
Do you have the same problem, if so, how do you cope with it?
And don't attend meetings that aren't absolutely mandatory for you.
Make someone else from the companies you work with to mark your progress on their internal systems however they like to use them, purely based on your to-the-point (calls, mails) communication.
With that approach you can take 5 more customers ;) All of the above sounds kinda crazy, but it's been tested in the battlefield for more than 10 years. Being as pissed as you are, @Op, is the best time to make those changes. Howk!
PS: If someone from you costomers' side isn't OK with that approach - fire the bullshitter. Take one that is going to comply. World is full of morons doing mostly virtue signaling, endless meetings, etc, instead of getting to the point.