Why are they always so weird and why does it attract weird people

I think because historically, Trot parties weren't just where someone would go if they agreed with Trotsky's theories or w/e (plenty of Trot groups basically disowned Trotsky at some point) or because you disagreed with the Soviet line, etc. They were also where people would go if they got kicked out, or left, the main communist party because they were wreckers, impossible to work with, sex pests, etc. These people basically formed the culture of Trot parties.