I agree. What's the plan?
Find a local lefty group (anything from Food Not Bombs to SRA). Participate, listen, organize, help people where you can. I live in a remote rural area and I still have half a dozen small but active groups to choose from, you just have to get out there and find them.
Edit - it doesn't matter if none of the groups near you follow your exact variant of communism or anarchism or whatever, we have much bigger problems right now than leftist infighting. Always deescalate conflicts with people who are not the enemy.
The two biggest things you can do are to get organized and read theory. All the Leftists in the world thinking really hard won't make a difference if they don't organize, it's the atomic unit of activism. If you're interested in Marxism, I have a "Read Theory, Darn it!" introductory reading list you can check out if you want, complete with audiobook versions of every work listed minus 1.
Honest question, how important is reading theory? Won't we need to build our numbers beyond where it's reasonable to expect everyone to have read theory? Especially given that much of it is written in an academic rather than a narrative way. Obviously there should be those in the movement who are versed in theory, but shouldn't the movement be open to as many as possible? And assigning homework as soon as they want to join seems like a good way to discourage engagement.
What symbol is that
Anti fascist flags
If anyone is in the New England area, check out Northeast Anarchist Union. https://linktr.ee/nau161
