Have you looked into Matrix?
Agree with the main point, though disagree that FOSS is “boycotting capitalism”, many for-profit companies contribute to FOSS and FOSS can be used by for-profit companies too, much of today’s capitalism runs on FOSS.
The point of free software is that it does not have owners, so what exactly are you “boycotting”?
Can you give some links what these “pieces of anti-trans legislation” were going to do? Not familiar with that yet.