Oh I did make AI for all my char.

It's because you are breaking the rules, I guess.

Try copying the exact same change state that is used by the player, then take out the command =XX trigger and instead add the ai conditions in there.

[state -1, AI] ;crouching weak punch
type = changestate
value = 400
triggerall = roundstate = 2
triggerall = var(59) = 1
triggerall = p2bodydist x < 35
triggerall = statetype != A
triggerall = random < 300
trigger1 = ctrl

[State -1, AI] ;weak kick
type = ChangeState
value = 210
triggerall = roundstate = 2
triggerall = var(59) = 1
triggerall = statetype != A
trigger1 = random < 800
trigger1 = stateno = 400 && movecontact
trigger1 = ctrl

It wasn't a jab at you namely. If you're ready to learn, I have nothing to say other than good luck and feel free to ask if you get stuck, a lot of people will be glad to help you as long as you're ready to listen to their advices.

most coded in ais end up being easier than the mugen default one, because of predictability.

No, everybody doesn't agree that a competitive AI is more important than everything else.

Because it's more work and not everybody cares about AIs because not everybody wants to sit and watch the computer fight against itself some people just want to spend more time on things that actually matter, and leave the AI for the very end if they even want to make one at all.
If you ask why Mugen creators don't make AIs, I'll just ask back why other people don't do it themselves. Because it's work to do and time to spend. And just as much as "a large number of people" don't want to learn about it and take the time to do it, Mugen creators may not want to do it either.
If you yourself want to make an AI, then you'll learn to do it and you'll take the time it needs. If any Mugen creator wants to make an AI, then he'll take the time it needs. If you don't do it, he may also not do it.

Basically, you need to modify the current ai (if there's one) that has been coded by the original author. There's no universal patch, each character has its own ai coding.

i love how ppl complain, u stole my content, i made that, dont u dare use MY character.........if anyone and i do mean ANYONE has the right to say that its oh i dont know
CAPCOM
SNK

just a hint no matter what u make any edit of an existing character or an origonal creation almost always a char form those 2 companys use there creations...........stop bitching,play with what ppl create  , i used to create under and old name that i let die, and i mostly did them for freinds and myself but it was crap like the complaining that i listed that made me stop and will make me never do them again, mugen is for everyone to enjoy , if nothing else if u love mk download it if not...dont its your choice  

sending