Why would the Jocks beat a former Jock who is also under Chad's protection and Chad is respected by all the other Jocks. That doesn't make any sense. It has nothing to do with speculation, it has to do with common sense. The Jocks didn't hit Troy.
Troy isn't under Chads protection, Chad even tries to keep their relation a secret from the other Jocks. The only time he can protect Troy from the Jocks is when he's there.
Troy literally said some Jocks took the guitar, if Tommy took it why hasn't Chad jumped him in the dark while he does jump MC in the dark? The guitar was stolen before the blackmail was delivered.
Dawe was hit by Troy and Troy got kicked from the Jocks, but Dawe didn't get to hit him, Chad was there...
So Dawe visited Troy and brought a few more Jocks, it's that easy. Dawe had a motive...
Why should Tommy have a motive to beat up Troy when he was hit by Dawe? That's not common sense...
Sure IF Tommy knew he could have blackmailed Troy, but for a guitar he was gonna give away? Why? To reassure Sage's relation with Chad with the hope they breakup? That's like giving people money hoping they go broke...