Jocks are masculine men that only care for sports.
When people talk about crypto bros and tech bros that's the whole shtick, they are saying their targets are not defined by technical ability (which is stereotypically attributable to geeks). So pointing out he wasn't really masculine is failing to see the metaphor behind "crypto bro" used as an insult.
Part of the SBF schtick was the "anti-bro" vibes. The intentionally awkward, low social skills presentation is used by some major altcoin promoters too-- but I don't think many people would identify it as "crypto bro" and that's a big part of why its effective.
Edit: upon reflection, maybe he is indeed a crypto bro - nothing in your definition is untrue. Using my analogy above, Crypto Bros are the Script Kiddies of crypto. Apologies.