Is there a higher rate of problematic tendencies in gay people?

From what I've observed, there seems like there's a lot of broken gay relationships. Things like failed polyamory, cheating, lying, using each other for sex, losing interest quickly, etc. I've seen this in two of my friends' relationships and on Reddit, which is the extent of my experience with anything LGBT.Are these issues in the gay community, or am I just misguided? I'd like to get the right ideas.