Telegram less of an "encrypted messaging app" than Instagram was (which, until May 8th, has optional E2EE apps using the Signal protocol). It's simply incorrect to think of Telegram as an "encrypted messaging app" when the default use case is not E2EE.
> the mishandling being a part of a evil plot to strengthen the surveillance state and promote fascism
DOGE strengthened the surveillance state. It does not matter whether or not it's tied to a singular intentional plot.
> Mass surveillance was already a problem back in 2013
Yes, and mass surveillance was a problem even before 2013. We saw it greatly expand especially under the Bush administration under the guise of the "war on terror". As you noted, we haven't seen Obama or Biden reform to account for expansions of power that happened under the preceding administrations. (Hopefully we can get another Watergate style realignment!) So, you have to think about the world in systems thinking, and you have to think about how the state of things are changing over time.
Musk endorsed Signal in 2021, but since then he's denigrated it as "vulnerable", promoted Telegram (which, again, is not even in the same ballpark), blocked Signal for a period and banned users for posting them, and has promoted XChat (which stores keys and metadata serverside and which does not even have forward secrecy).
Musk is a proponent of surveillance and censorship, not the other way around.