Why is pantheon so broken?

So i don't understand why 75% of my games i'm teamed with an AI ally that runs around in circles suiciding.

So i don't understand why 10% of my games i'm matched without an ally at all... That's right it's 2v1 no ally at all.

So i don't understand why pantheon matches are 2v2 but 5v5 maps are chosen and take hours to complete with balanced teams.

The other 15% of my games are balanced 2v2. I win all of those..

Just wondering why this so called tournament mode is so horribly broken.

Anyone else have these problems?

Thanks for your time