Let's test that theory
0:24 - Chipped by the running back while being blocked by LT, is still a half-second away from sacking the QB
1:01 - Double-teamed by RT and RG, splits the double team and forces the QB to throw it away
1:23 - Double-teamed by C and LG, splits double team and gets in QB's face who is able to check it down at the last second
1:37 - Double-teamed by LT and LG, does not break free but the play is stuffed at or just behind the line of scrimmage by another player
1:47 - Clowney is too aggressive and is offsides, but on the replay you see both the LT and LG face him at the same time
2:14 - Chipped by RB in addition to LT blocking him
2:23 - Swims past LT and is immediately chipped by the RB
2:31 - Swims past LT, is immediately chipped by RB, still chases down QB from behind after forcing him to run away rather than pass
3:19 - Chipped by RB while being blocked by RT, dropped back before rushing up the middle, but got caught in the slog of players and the QB was able to get away
4:59 - Is being blocked by LT who receives help from LG, QB gets sacked from too much pressure up the middle
5:24 - Double-teamed by LT and LG; Clowney at this point looks a little fatigue but the play is made away from him, with the QB throwing to Ebron
5:32 - Clowney dashes past the RT and is immediately chipped by the RB
5:58 - Beats the RT inside too quickly for the RB to help out, who is on the other side and was expecting to help outside. After the QB makes his pass, Clowney is tackled from behind by the RT, much like how Cushing was injured against the Jets
6:55 - Swims the RT (this guy is reminding me a lot of Watt with all these damn swim moves, haha) too quickly for both the RT and RG to double-team him effectively, and the RG can only hold so much before Clowney gets a QB hit in, forcing a throw out of bounds in the red zone.
7:10 - Brushes by the RT, chipped by the RB, and gets his hand on the QB but is unable to drag him down (QB was still forced to throw it out of bounds). Notably, the camera shows Clowney bent double before and after the play, probably due to a combination of the stomach virus he had been suffering from as well as exhaustion from the game.
So while he wasn't double'd on every snap, he still garnered a significant amount of them during the UNC game. In addition, a lot of the plays he was in on usually involved running or throwing away from him, or throwing a screen over him in order to take advantage of his aggressiveness. There were a few times he was left unblocked and he either barreled into the running back or chased him down from the other side. As I mentioned earlier, Clowney had been dealing with a stomach virus prior to this game.
In addition, because of the cut-up nature of that youtube link, without watching the full game would I know the context of every snap, such as whether Clowney had been resting after a long South Carolina drive or with little rest. Brett Kollmann
goes into a similar analysis for Clowney's game against Tennessee, which I would highly recommend reading.
So maybe you don't know what you're talking about?