User blog comment:SpookyBoogie27/Light Novel Spoilers/@comment-8.28.150.75-20140210091944/@comment-1359322-20140211152622

Also you're clearly forgetting that Issei couldn't fight Saji at his full power because of the special ruling of the Rating Game at that match that states that Rias' team can't destroy department store, they are battling in. Just that ruling alone would've cut Issei's combat power in half. How is that embarrassing?