Well I'd say small maps are often not AI's strong suit.
I dunno try with something a tiny bit more spacious like tag rock, eye of the storm, salt rock colony, Syrtis major, the Dark heart, or arcane.
all of which are 10 x 10 but less in your face then cobalt valley.
but yeah that being said AI generally deals pretty poorly with 10x10 commander bum-rush.
try it on 20x20 maps. try seton's clutch they're pretty hard to deal with in this case you may well end up dying.
if not try with AIx and 20x20