Pestum

bfme and aotr bridges are magical

Any advance with those bugs? No changes for 7.0 except for black uruks, now they join to the buggy hordes.

I never played against soldier or peasant IA. I can imagine is the same than captain/deathmarch minus something. 

A valid and winning strategy against IA is mirror the harras tactic. At first you feel it´s useless but when you destroy 3 resources buildings you will notice less enemy troops. Once you had the advantage is impossible for the IA to recover unless you let it.

Another way to win is Rush. The old and simple rush will let you win in about 15 minutes. 3 melee 2 ranged to start the attack and keep sending units until you win. Keep an archer (sometimes a pike too) to defend your resources because no matter what the IA still is IA and is programmed to attack your resources even under heavy attack (is a good defense anyway).

One think to keep ALWAYS in mind. You need to command your units all the time. This is not starcraft. If you let them alone they will die chasing a buterfly. And thanks Aluvatar the aotr team remove some building patrolls. Still anoying as hell but a little less. I hope they remove patrolls definitely on the final version.

Search on youtube AOTR Theguyoftheeast. He have tons of gameplay and his style is fitting to destroy any IA.

The best advice i can give you is to use the handicap tool until you feel the ia play your game.

Sometimes i play against IA to try to win a match but most of the time i play against ia to build a city, maybe use some unit i don´t use often and imagine another adventure on middle earth. 

I watched the video and never happened to me. No need to uninstall directx just reinstall directx9c and if you can 11 or 12 most of the time you can´t.

Uninstalling video drivers. Make sure you already have your drivers for the install. Press WINDOWS + X. On the top you will have screen adaptator or something like that. Click the little arrow. Your video card should appear in the list below. Just right click and select uninstall hardware.