Wow! That is really unfortunate.
If you can't accept losing to tougher opponents than you will never become a better opponent. No matter which full leagues you join there will always be stiff competion because of quitters like you.
You had an interesting oppurtunity. 1) You could have drafted really high and been in an interesting negotiating position to quickly improve your team. 2) By continually playing against tough opposition you would have improved your on play.
My advice....Come back or go play pac man dude. Do not join any other leagues if you cannot accept losing.