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Can the abilities of a commander be played from the command zone ? In this case Yasova Dragonclaw ?

AI Dumb #1: I had three tapped creatures on the field, while the AI had none. They used Mark of Mutiny to borrow one of my creatures ... then didn't attack or otherwise make use of it before it was passed back to me on the next turn. My best guess is that their should-I-attack calculations didn't recognise they couldn't actually keep it to block with.

AI Dumb #2: The AI has two 1/1 Aven Squire on the field. On two occasions when I had nothing to block with (either at all or due to their flying) the AI alpha-striked and attacked with both for 2 life damage when they could have just attacked with one for 3 life damage due to exalted.

AI Dumb #3: I was attacking with a Mogg Maniac and a Lightning Elemental. They had a single 4/4 creature untapped and capable of blocking either. If they had traded for the elemental or even blocked nothing they would have survived the combat on low life, but instead they chose to block the mogg - immediately killing themselves to extra damage taken from its ability.

I've noticed that when I attack with more creatures than the the AI has blockers for a potentially lethal attack, the AI blocks the wrong creatures, which leads to the AI losing when it didnt have to. (See attached screenshot for example). This has happened in three different games now, but the AI used to be smarter than this. It appears to me that the AI is prioritizing preventing its own creatures from dying even though it will lose the game from this attack. Instead, it should sacrifice its creatures to the stronger attackers to prevent losing this turn (in this case it should at least block the 4/4 and the 2/2, or else the 7/7 and the 4/4).

Opponent has a Shivan Zombie out. I attack with a Wolf Pet, a Metallic Sliver and a Steelform Sliver. I'm expecting the zombie to block the Wolf, as the Wolf would die and the zombie would be untouched. However, the zombie instead blocks the Steelform... and continues to do so until I win the game.

If the AI has no cards left in its library and would die the next turn anyway, it should probably attack with everything just in case it works (assuming no cards like Laboratory Maniac are involved).

How could Laboratory Maniac card turn this around?

Since it would win on the next turn anyway, doing a suicide rush has the potential to lose on the crack-back, hence it's not the best decision.

The AI has a Lovestruck Beast in play ready to attack, it needs to put a 1/1 in the battlefield to attack, it has one in hand. However the AI put the 1/1 in the main phase 2 instead of the first one and is unable to attack me with the beast until the next turn.

Also, when I have a planeswalker, the AI decides to attack it with Questing Beast instead of attacking me and letting its effect to damage my planeswalker.

AI cast Enlarge at his Wall of Roots (it was his only creature)

AI is confused by Chimeric Sphere, activating it multiple time in a turn

AI keeps attacking planeswalkers without considering its opponents' blockers (ie it's attacking with a 2/2 while i can block with a 3/3)

AI is very gung-ho:
Opponent has two 3/1s.
AI has 1/4 flyer and lower life total.
AI swings with 1/4 flyer, dealing 1 and taking 6 in return, dropping even further behind.