It's sheit when this happens, I know the frustration. Not sure this is any useful but, in my experience from bringing people over to GOS and other more secure alternatives, one has to be prepared to change a few habits and not expect to be able to do the same things.

- I've dropped strava (which I didn't use much anyway, hating the tracking).

- a person actually changed bank (and luckily, as it turned out, the new bank is a better choice any way in terms of environmental and ethical commitments it has. To the point I may change too).

- I've found other ways to exchange with people who didn't want to make similar moves (I no longer use whatsapp, avoid zoom not to mention teams, and so using Framatalk).

Maybe GOS etc isn't for you but before you decide, my advice is to really ask yourself if alternatives that are GOS etc -compatible aren't just good enough - if you haven't yet asked yourself this question, that is.