It's the cheating. What pizzes me off even worse is the NFL front office knowing it's going on and not doing enough about it.
Stating with the SB they played against the Rams. Workers being miked up and Bellecheat getting Rams signals. NFL front office desotying video tapes to cover it up. Anyone who watched that game could see the Rams WR's and Faulk were clearly being held well beyond the LOS and officials let it go on.
Deflating footballs. (it's a fact deflated footballs are easier to hold onto, less turnovers).
According to profootballreference, the Patriots are #1 over the last ten years in benefiting from penalty calls on 3rd down resulting their offense getting a "1st and ten" instead of a "4th and punt". (Proof enough for me of official favoritism).
I hate the Patriots because they cheat. Spygate, Deflategate. Spying on opposing teams practice. Stealing signals.
What else has Billecheat and the Patriots done that they haven't been caught at? Like most criminals, they don't stop until they get caught, but in the Patriots case, they know the NFL isn't going to do anything so they'll keep cheating.