I downloaded your map, open it in WcWE and see following things:
1/ Terrain is poor. You just put tiles into your map without blending them with each other. It makes your terrain looks ugly. Plus you don't use decorative doodads. That makes the terrain even worse.
2/ Emptiness. This is the most serious lacking in your map. There's some area look really empty. Put something into those spaces
3/ Space for each player to build base is not big, as I think
4/ 2 Ancient Hydras in 1 creep camp is way too strong, I think.
5/ Description's problem again.
Above are my opinions. I can't rate this map, sorry.