signal cannot be self hosted, insists on google locate-ya captchas, the build cannot be reproduced, and is heavily phone number centric
it's honestly no different to facebook whatsapp or telegram
time to switch to truly private messengers like Simplex, Session, Briar, or self hosted matrix/element
It is different. It has flaws like those you mention but you are over simplifying incorrectly.
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it does have differences that make it better than all the other phone number based systems
still better to avoid anything that collects phone numbers though
if you must use Signal servers, it's best to use Molly as the client, and a throwaway or virtual phone number