I don't care about suppsoed bias. Oliver is just a terrible referee.
Lets players get away with anything for an hour then boooks people for every minor offence for the last 30 minutes. Causes problems in every single game because it winds up both teams.
Constantly gets big decisions wrong. Visibly influenced easily by fans or players shouting at him a lot.
He's shite
He's the new Clattenburg. Both Oliver and Clattenburg enjoy the attention they get from being surrounded by a bunch of angry footballers. They love nothing more than being able to march backwards twenty yards, sternly waving their arms out to clear away players, and do a slow reach to their pocket to bring out a card.
I've mentioned it before, but the FA Cup game vs Arsenal the other year was probably peak Oliver, and an almost perfect representation of how he referees a game. He let players on both sides get away with flying into tackles, cynical fouls, diving, repeatedly fouling, and general shithousery for 80 minutes, before flashing a red card to Di Maria for tugging at his shirt in attempt to stamp control of the game. He made it all about him, all in the name of "game management" which is funnily enough the same shite Clattenburg has come out with recently, where he admitted he should have sent three Spurs players off vs Chelsea while Spurs were chasing Leicester, but he wanted to let Spurs implode.
There's a blatant disregard for the laws of the game among some of our supposed top officials, and there seems to be a feeling among some of them that they are there to orchestrate a match, rather than simply officiate it. Clattenburg has even said as much, before he left for Saudi Arabia.
A big problem is that this refereeing style is often praised by the media and supporters alike, because it gives the impression that the referee is trying to let the game flow. If a player is booked for a bookable offence (a dive, a late or rash tackle, a cynical trip) early in a game, then the rest of the players on the pitch will know they won't get away with doing similar. As you've said, failing to do so means the closing third of a game, which can often be a tense and charged affair, ends up as a farce because both teams are wound up. Oliver and his ilk love this though because they get to flash a few cards and have a stern word with a couple of players, and then appear to have "taken control" of the game after earlier attempting to let it flow.
As far as I'm concerned, a referee shouldn't be noticed. Good calls are good calls, and people soon forget about them, and the person who made them. Bad calls are often controversial, but more importantly, memorable. The likes of Webb, Clattenburg, and now Dean and Oliver absolutely adore the limelight, and know that the only way to get it is to make "controversial" decisions.