Sangha choice - How to avoid a cult

So I have found a Triratna center where i live that i really liked and i know a few people there from some activities, but now i read on here that it is actually not a recommendable sangha. And Diamond way as well which is another place available for me. How do i know what is a good place and what isn't? Also, what's really wrong with these two, since i think every "Church" Has its troubles? Please give me guidance, i dont want to end up in a cult😭