I've had the same experience multiple times on top lane; even giving one kill forces you into a heavily unfarmed position and a much higher potential of being snowballed. The isolation doesn't help either, especially when you're melee and you're forced to go close for farm (creating even more potential for enemy zoning). You either farm or you die, and it starts to feel boring and stale, especially since most of the time you stay there until midgame. I have to take teleport most of the time to deal with this, and even then it doesn't completely solve the problem and I also now lack an ignite to have kill potential with.
When I do have to go top, I usually pick Vladimir; lifesteal, damage, survivability and range; all the things I love. He's pretty much my only competent top laner (other than Rumble, but with him I have to deal with the above issues much more.