Where did the AI leave it's I

[Late]

I have high AI skill(I think, how can I check it) and no bonus. Almost every turn enemy attacks with few battleships, mostly one at a time. And it can't even fight well. It has been a long time since it destroyed anything of mine.

My defending forces consist of 13 destroyers and one cruiser. My ships are defending a warp point in my system. (Cluster quadrant -> the only way to may area) Most of my destroyers have capital ships missiles and maximium range strategy. Some have depledet uranium cannons and optimal firing range. All the destroyers have pointdefence cannons.
The ships are not as a fleet. One of them has been there long enough to have experience: legendary(50). That ship is
beginign to have really old technology in it but it's still alive. The cruiser has a space yard so it can repair other ships when(if) they get hurt. The enemy would just have to wait 5-10 turns without attacking, make one large fleet and it would probaply be able to take many of my systems by suprise.

Why is the enemy so stupid? Is the AI going have the I in a patch anytime soon?