Hey, i was your opponement on this game. I can give you my feelings about that (sorry for the english, not my native language).
First one, you have a deck pretty silmilar to mine, and like this one say:
You used a similar tactic, just not as well
With this deck u want to put pressure on, and then never release. For that i use a lot of cheap units. Why ? For the map control. That's the only things that matter.
So you go on the shokepoint, yes. Good point. But u forget to securise the space between shokepoint and your base/cv. So that's a free road for me. Like you said, u want to put a AA nets on. Like i did on my left, none of your chopper could pass, and a lot when u were trying tu push u couldn't. Why ? Because i have a lot's of units on the map, u really to take control of the map.
This lead us to your cv defence, yeah i think u can work that a little more. Look mine, i don't remenber u kill one.
I never put real AA on the map, that was a huge mistake of mine, and u use that well (i did the same

).
Put more recon. This will help you a lot.
Try working on these things.
I also think heli infantry are not really worth the use, maybe on other things than shokepoints, like for recon, or ambush on the ennemy land.