Drunk & Root

or you can snap your ssd in half or shoot it if your american

is it single use links?

u could prob find a way to do this with nextcloud i saw smth like this on fdroid for nextclouf

id say use the soical media in a browser and if u dont need a account use it over tor and all the people on telegram,messanger and whatsapp tell them about the privacy concerns with these apps and try and get them to move to simplexchat or matrix (especially if you self host) so theres no real drawback because they dont require any info of yours to work

synapse can be resource intensive but u can conduwuit or now tuwunel and its pretty lightweight https://github.com/girlbossceo/conduwuit https://github.com/matrix-construct/tuwunel

instead of matrix id say SimpleX-chat it uses tor a lot more

i mean cant go wrong with a self hosted matrix instance im pretty sure theres some managed hosts that make the process eaiser i dont know if this is what your looking for but cant go wrong with it