Good, it leans left, but not so far left that it’s just LGBTQ/feminist spam. It doesn’t have a bunch of right wing trolls so far. It’s like the early days of Reddit.
It's not quite _spam_ but I think it's fair to say it's much more left-leaning than mainstream Reddit.
Some of the biggest communities, even non-political ones, are on instances such as Blåhaj (LGBTQ-oriented), Lemmy.ML (Marxist-oriented), Hexbear (Marxists on meth).
Short of subscribing to a defederated instance, you need to go out of your way to avoid left-wing content on Lemmy. Whereas on Reddit you could get rid of most of it by unsubscribing from the top 100 subreddits - which is something you wanted to do anyway for the sake of quality, even if you were the world's biggest leftist.
I'm always hesitant to make accounts on new sites, so I thought I had waited a long time to join officially, but I ended up being in the first 500 accounts! From the earliest days (the del.icio.us to Reddit influx) it was a very libertarian place. Sometimes annoyingly so.
Reddit has shifted so many times over the nearly 2 decades, but most who stay for a long time have realized that it's great for pocket communities in smaller subreddits, as long as they last and aren't co-opted. The bots are the worst part at the moment.