honestly sticking with FOSS mostly solves all this.

ive been using firefox for more than a decade now without problems. mozilla is certainly fumbling but the browser is still good enough imo.

truly open phones would solve that problem for good, but any foss rom will get you covered and always has. anything goes as long as it can run lineage or similar.

as with email or vpn services, i don’t think theres really a good medium term solution there since these services are run by third parties. those are always about trust.

its a capitalism problem more than anything, really, but most of it has stable workarounds.