if you disconnect the phase wires, does the motor spin freely again? (probably)
if you touch the phase wires together does it feel the same kinda drag/“regen” as when plugged in?
if so I’d be worried the ESC probably internally shorted. maybe inspect the vesc near the output FETs a second time to see any burned something you might have missed?
Get a replacement from the vendor?
what kv / voltage / gearing are you running?