Marksmen is kind of a useless role

You are outdamaged the first 20 minutes of the game by basically every class - tank, assassin, mage, bruiser. You then spend 20 minutes farming not to get strong but literally to break even and even then any assassin bruiser tank mage will still one combo you.

The concept of a late scaling, item dependent, extremely squishy class has never been less useful than it is in this meta where games are more snowballed and the game is mostly centered around early > mid game.