heavy-handed moderation and echo chambers where any dissenting opinion gets buried
I have bad news for you lol
It is fine, Lemmy is far superior. But, their baffling decision to copy Reddit's "lords and peasants" model of moderation has led to a lot of the same moderation rot on Lemmy I am sad to say. It's just in less of a late stage terminal form as it was on Reddit. At least the echo chambers are separate echo chambers, and they can yell across the void at each other. lemmy.ml is pretty much the only community that is severely balkanized to its own isolated community where politics / geopolitics are concerned.
In general, Lemmy is nice because it is more varied. lemmy.world is the most Reddit-like in terms of having a "hivemind," then there are particular smaller servers with their own cultures going on. It is more quiet but a lot more human in my opinion.
Enjoy.