I believe 2015 would be the last year Lee played at Tulane. Their schedule was this. I wouldn't say this is all "playing against the same level of talent."
Duke NO
#15 Georgia Tech NO
Maine Yes
UCF Maybe
Temple Yes
#24 Houston NO
Navy Maybe
#16 Memphis NO
Uconn Maybe
Army Maybe
SMU NO
Tulsa Maybe
I mean, some teams are better than others. But that's mostly their conference. You conference has (relatively) comparable talent. And considering SMU was 2-10 that year, I think you're kind of guessing on this. Unless by "NO" you meant that Tulane was so much better they weren't on the same level.
And I'm always a little amused when this comes up. Same way when some of TA's struggles early on were blamed on our OL. Your QB needs to be able to bring everyone else up - play better than others around him. Period. If he's only going to be as good as the guys around him, you're not going very far.