As nocturne, He is really difficult to play when the enemy team is grouping together. Nocturne wants enemies to split up so he can use his Ultimate a to pick them off.

Nocturne is super squishy and gets blown up in team fights quickly even with his s. This makes it difficult for him to fight unless he’s ahead.

It is very easy to fall behind when playing Nocturne. If you take a lot of damage through one misplay, you will not be able to play aggressive in lane. As nocturne, It's really hard to play when the enemy team gathers together. Nocturne wants the enemies to split up so he can use his Ultimate a to pick them up. Nocturne is super squishy and gets blown up in the team fights quickly even with his s. This makes it difficult for him to fight unless he advances. It's very easy to fall back during the Nocturne game. If you take a lot of damage through a bad game, you won't be able to play aggressive in the way.