I think it’s a personal decision. As in, you might be cool with a car from that company or using proton’s services, but that doesn’t mean that everyone else ought to be cool with it too, because they need to make their own decision.

By being a customer of whatever company you are tacitly condoning their behavior.

I feel like this is an infinitessimal part of the problem.

As in… to make a proton substitute you need a similar level of resources. If you have those resources then domain reputation would be a snap.

syncthing if you just want to keep a few folders in sync between devices.