I can't seem to put my foot on my problem here, on why is so difficult to play 
against so many 
champions that can easily 1 shot you. regardless if you building against it?
Does have a terrible early game much like 
before lv6
Do they both scale bad into late game.
Did the Jungle change really screw up the routes up or the river bed 
change?
They hit a power spike 6, they can easily shut down a lane with their ult, making the tables turn around. They fall abit late game, since yi and eve are ment to go in and out, but its hard to do it in team fights. They are really strong mid game and have fast clears.
Cho fucks you up with his silence as it stops your Alpha and Veigars cage is gonna fuck you up too (if he's decent). Zed shouldn't be much of a problem, but it's zed so yeah.
Your early honestly is terrible, but you scale like a god.
I personally play yi mid, in the zed matchup i just keep my alpha for when he ults me. Doesn't even have to be him you alpha if you feel like your reaction is too slow. If you win the coinflip, and your alpha does what it's supposed to, you'll dodge his burst.
Yeah yi scales badly into the late game against proper team comps
