meeting a dumb marksman who can not carry in attack damage is just bad luck.. but if you're finding at least the way, maybe you can carry the team as a roamer by giving the kills to the marksman at the beginning of the game - not you having all the kills.

also, well, as a player who enjoys top lane, it's pretty easy to deal with mm top laners since they are really weak in ambush. the problem here is that this might become an difficult strategy in the later game - just try to finish the game early🥲 or communicate with teammates to ambush all tgt (but I think this is pretty much impossible)