Not only that, but he screws over Umbrella big time by systematically allowing the heroes like Leon and Claire and Chris and the surviving S.T.A.R.S members take care of Umbrella's screw ups while he worked behind the scenes collecting all the viruses and taking care of the remnants of the company all by himself. Better yet, he testifies against the company in court when he's collected sufficient evidence to shut down the company for good and then start over with him in charge.
Chris and Jill's battle against the Tyrant-Armored Lethal Organic System is this, especially if one reads the file from that level which describes the T-A.L.O.S as having a 100% success rating against dozen-strong units of professional soldiers. Its kill-count only tends to drop towards low levels when faced off against armored vehicles and attack helicopters — even then, a 2 on 1 AV's vs. T-A.L.O.S battle results in an average of 89 tanks killed in exchange for 2 Tyrants, while a 1 to 1 battle against helicopters gives an average of 48 copters per 10 Tyrants. That's nearly five to one odds in favor of the Tyrant against the vehicles it's weakest against. And yet, despite the stats, Chris and Jill still manage to take the T-A.L.O.S down, singlehandedly. They are that good.