Sometimes it's a skill issue but sometimes...
I'm new and I have less than 100 hours. However, I've been playing somewhat consistently (every day or every other day) and I'm starting to notice something. I guess I'm on some weird MMR threshold and when I play Killer I sometimes get a legit team of swf bully squad and lose the game in two minutes and then the very next game it's a disorganized solo queue. I've noticed it happen a few times and I guess the polar opposite experiences were jarring enough to be memorable to me.
I play both Killer and Survivor and can't say I've noticed anything that imbalanced while playing Survivor. Some Killers are better than others but for the most part their skill level is pretty consistent. When I play Survivor and lose it's because I played poorly but when I lose as Killer it's not as easy to say the same thing.