There's three types of people he could be.
Just an overall miserable person that likes to bitch about everything. Unhappy with life for real or imagined issues. Complaining makes them feel more complete.
An Cockeye/Colorado/K St troll is very much believable.
He could also just be a miserable fan like
@Gman1228.
@slattimer insists G isn't a miserable person so I'll take his word for it. The type of person that complained about the team in the 90s because we only won by 2 scores. Generally though those people only show up to complain when things go badly. Kong is around all the time.
I'd lean fan of another team/Nebraska hater with miserable overall personality the next most likely.