If you've had bad experiences with anarchists before I'm sorry, but in my experience anarchists have been much kinder and more welcoming than marxist-leninists, especially in person. Characterizing anarchists as the angsty atheists of the political world is a bit hurtful, but I can see where you're coming from. In the same way atheists sometimes lash out against religious folks, anarchists sometimes lash out against marxist-leninists because of bad experiences in the past. A lot of anarchists I know went through a similar political development where they started being curious about socialism and were met with pretty harsh responses to questions about the more authoritarian aspects of marxism-leninism.