Hey NYN,
This map is pretty tough.
Strategies...
Block the bridges. If you go PE, you can fully block entire sections with roadblocks.
If you have a team mate or AI teammate, you can make them blob areas with CtRL+A.
You can rush the right side in front of the forrest to make a single bottle neck, instead of a two wide ones.

Give that a shot.

Peedaaah - your UE maps are great! Probably among the best on the workshop.

However .... this particular one seems the exception. The enemy is way too overpowered. Advancing in any direction way is pretty much impossible: on the island every building near the initial paratroopers locations is within range of the multitude of machine gun encampments and sniper nests so you cannot get a foothold - and on the main base, is too wide open and there's insufficient resources to actually hold off the enemy attack (which seems timed to kick with tanks galore at the 5 minute mark or so).

Any tips on how this map is supposed to be tackled?