Solo Survivors are Generally not Aggressive Enough
Just my experience as a solo survivor. My teammates are either healing, hiding, searching for all the chests, rather than focusing on generators. That is probably 70-80 percent of why we die in matches, because survivors are basically not doing the main objective, i.e. generators. Other reasons: survivors often lead the killer to generators that are close to being completed or continue to go down near generators being worked on; or two survivors go down next to each other and it makes saving them more difficult. The list goes on...
I feel like there are some very fundamental strategies to this game and a lot of the solo's I get stuck with just don't get it.