Feels so bad to play assassin when your team is feeders

Like I love playing shaco and evelynn. I love assassins pretty much, they're super fun. And maybe even shaco a little bit more cuz he can get objectives better despite his team being shitters. None the less... these two assassins are really hard to carry with if your team is feeding and like doesn't understand u need them to initiate fights cuz u cant just walk in and get fucked to pieces... sometimes i start a game doing great im like 3/1/3 or something but then teamfights start and if your team is far behind then you get cucked. But i guess to be fair shaco can just split push if his team is feeding and get something done, which is another reason he's a better champ than eve, but im still relatively beginner with him.