Google is actually right here for once. Signal is not offered on F-Droid, and its package name is org.thoughtcrime.securesms, not org.thoughtcrimes.securesms.
Only official places to download Signal are through the Google Play Store or their website (which self-updates).
Brave is not spyware. That website you linked is horrible and full of misinformation. They also claim that Firefox, and even Tor Browser, are spyware. They act as if any and all connections a browser makes are automatically bad and used for spying/tracking.
I won’t disagree with the other criticisms of Brave that you made, but just wanted to point that out. That website is just highly unreliable and makes verifiably false claims about the browsers it reviews.
Not sure how it hasn’t been said yet, but I really like Helium314’s OpenBoard fork. Can’t recommend enough.