Lags out, not sure if this is winnable.

I beat your map in 9:47 , I would not say this was unfair at all. You've set choke points that work in your favor, along with invulnerable "Checkpoints" with walls of flesh. It was fun, thumbs up.

my map is unfair

This map is totally winnable... if it doesn't lag out to be unplayable. Just don't breach the human wall and you have all the time in the world to build up. Just you can't do that since then the humans keep spawning and your units stop moving.