Yay, even less custom rom support because of non standard hardware. Xiaomis used to be generically implemented devices with decent SDM chips and now, we just have whatever this shit is and mediatek.
Yep and Discord is just a pain. It's laggy as hell on my Redmi 4x and I have to use Aliucord for decent performance. How did you even start using signal? Is it popular where you live? I don't have any friends or family members using it.
Divestos(and the replacement AXP.OS) or just plain lineageos. Others are just crappy nockoffs. And of course graphene if we can even put it in the same category.
In EU, I would recommend a xiaomi. Cheap, bootloader unlockable (which breaks security a little since you cant relock), but they are a gamble in terms of reliability.
Or use a Muppet to make a predator for children.