Reddit with defaults or r/all is a horrible experience. It is what you make of it though, and if you don't make anything of it then it is obviously not for you. The advice I always give to someone trying reddit is to 1. make an account 2. unsubscribe from all of the defaults and 3. search it for whatever interests you. Pretty much everyone can find something for them, and moderation is going to be variable which I think is actually a net positive. A well moderated sub is a gem, such as AskHistorians, but not every sub needs to be moderated to the same extent as AskHistorians to remain useful or relevant either.
But your description is completely accurate if you are interested in anything remotely political.
I even had to unsubscribe from subs dedicated to my favorite video games because it gets so toxic.