Not really. More politically far-left than Reddit is (and more political just in general, actually), but other than that Lemmy is more or less the same when it comes to how its users act and treat each other.
Yeah, that's pretty much the only part of Lemmy I really don't like. It feels drastically more political than Reddit did. I didn't even know what the hell a tankie was before I joined Lemmy.
Make good use of the community/user block feature and it cleans up well. It took me a couple times going back and forth but I'm done with reddit at this point, at least for general scrolling 'all' sort of content.
As long as you're not in one of the famously shitty places like lemmygrad, it's pretty politically normal. So, extreme extreme extreme left by American standards. Like "we shouldn't actively fuck our citizenry in the ass and maybe even help them" levels of left 😱
But do keep away from lemmygrad and whatever the other shitty ones are.