I'd echo what others have said, that blowing up about shit calls against your team is different to saying they are the reason your team lost. We all do it, there's nothing wrong with it, most of us are even right through the bias about how shit the call was every so often.
I will say though that I think the deeper issue and the main source of frustration is the inconsistency and the lack of accountability. Every single referee in the NRL seems to make different decisions, and there's no accountability when they get it wrong or when the inconsistency is exposed. There also doesn't seem to be any attempt to stop the inconsistency. I also agree that referees seem to referee lower teams much harder than they do good teams. I don't think it's any conspiracy, I just think they are poor referees and they focus less on the good teams because they think the bad team is more likely to struggle.
I also think it's inaccurate to say that referees are rarely a factor in the result. NRL refs regularly influence results with their decisions, especially in the modern NRL where posession and momentum is everything. They don't do it deliberately, which I think is where most complaints get a bit ridiculous, but through inconsistency and incompetence they absolute can and do influence results.
It's disingenuous too IMO to say that just because a scoreline is a blowout, the referee is blameless. It's obviously much less common but I think we can all remember games where penalty counts of 12-0 or so and heavy set restart counts have happened. Again, in the modern game, that's a death sentence for most teams. It's not to justify blaming the ref, but more that comments like that go too far the other way. Reality is in the middle, a referee can influence a game and cost a team a win, and they do, and the scoreline doesn't always negate that.
Tldr NRL refereeing is dire and needs to be fixed, and I think fans are entitled to complain about it, but there's no conspiracy and referees aren't generally the only a reason a team loses.
