I hate to sound rude, but you should have gotten blown out. His DE ratings are low, but your ratings in important OFF categories are worse. Many of his backups are better than your starters.
The fact that he blew you out is not surprising at all. Also, consider the fact that your starters basically sat most of the game since both teams played their backups most of the game since it was a blowout. So your best players were barely in at all. For example, your backup guards have speeds in the 30s and 40s, his backups are in the high 80s-90s.
You have 1 player above 70 ath and 2 above 70 spd (none above 85 spd). He has 3 above 70 ath and 5 above 70 spd (4 above 85). You have noone above 60 Reb, he has 5 (no easy second chance shots for you).