Yeah DSA is the left wing of fascism imo, been in spaces with them for years and it is very disturbing. I do believe a lot of good people get wrapped up in there thinking they can make it better but god is that an awful org to be a part of. I think PSL isn't beyond changing it just needs really dedicated and principled comrades. I guess what you'll be missing from joining PSL would be like, a more intentional education track but if you are good with studying already, an organization doing actual work with colonized groups and marginalized people in general would be a much better learning experience.