Incompetence doesn't have to average out over a season. You aren't guaranteed a quota of it. Even if every decision you disagreed with was given in favour of City, Liverpool would have still won the league. They were better than us.
It is good for the PL brand when different teams win it. That is a factual statement. People call the French and German leagues farmers leagues when one team wins all the time. That would mean we have been assisted for our title wins too, which I don't remember there being a suggestion of at the time.
You have no evidence that there is any clandestine methods being used to make us lose games from outside influences - we're more than capable of losing games without any help. Equally, I can't prove a false negative so you can carry on with your beliefs. But, I am saying - with conviction, that due to the incompetence that is evident, football administrators and referees are not capable of organising a conspiracy on the scale (or a smaller scale for that matter) that is often suggested on this forum.