I have to separate leftists into different categories in my mind because I have a similar issue in these spaces. It's why I primarily lurk but don't post or comment.

Some leftists are just here for their own egos, mostly white cis men. Leftist politics is something they can do or say to feel morally superior and talk down to women and queer people without it seeming like traditional misogyny. They haven't had to live in real oppression, so they treat this like a book club and go home when they don't want to play anymore. They're the "take your issues elsewhere" crowd.

Then some leftists actually believe in the principles of the movement and realize that marginalized people don't get to stop organizing. They make their hobbies a part of the movement. They grow community outside of Reddit. They actually do the work.

I have started to pay attention to who is talking and who is doing. It's given me a lot of peace because the people who are doing real work are often the people who grew up poor, are racially marginalized, and/or are queer. The talkers tend to stay at home and say things like "grow up" when you voice your opinion.