I suspected you were going to ask me that, haha.
I'm a football fan and a supported of Manchester United. I owe no allegiance to any player and I call it fair and square, whether you play for Liverpool, City , Leeds or United. Just because a player plays for Manchester United, it doesn't make them immune to criticism. I still have a massive poster of Wayne Rooney, I still have my first player selfies with Fellaini on my Nokia 6230 (throw back. Lol) but will not stand in my way of criticism or praise. Did I like him in his pomp? I thought he was an awesome player, not my favourite by any stretch as I have a preference for CMs over Forwards. Do I think he is amongst the best forwards in my time? Far from it but he was an awesome player in his pomp IMO. Do I like the fact that he toyed with us during contact negotiations twice? No but it still does not infringe on my opinion in his on field display . Doe stay answer your question?
As for the 29 year old player suddenly becoming crap. It's because sport age is different to regular age. You calculate sport age from when an individual begins to exert close to his maximum potential on his physique. To is Rooney 30, but sport wise he has the body of a 35 year old. You have to appreciate that Rooney has been pushing his frame 4 years earlier than his peers had started. Not only that, he was an energetic player in his prime and by the time he was 27 his body gradually began to slow down. If I'm not wrong, footballers tend to have an avergae playing span of 15 years, injuries permitting. If Rooney started at 16, it makes that by now , he is way into his decline. Look at Designs, he didn't start till like 21, he's 38 and still active and in his decline. Rooney's body is shot and honestly is not too different from Gerrard in his final years at Liverpool. He wasn't as bad as Rooney was in the context of a whole season regardless of how biased United fans want to be but he just had to go for the sake of the team. In similar fashion, fans, pundits and coaches tried to shoehorn him whenever the opportunity arose. He has left, they have a new manager and the players look like they can get better but Gerrard is still a legend.
This is why you can't keep feeling like people hate Rooney, he time is near and that is just the reality. It's nothing personal, it's just the circle of life. He has had a good career that has spanned a long time. That's just it really. The fact that his form and decline has been a topic for discussion for United and England for a few years now is testament to that. If at 28, people feel like his time was nearing its end, it says it all really.
For this reason, we can't keep using history or past career achievements to justify his privileges. Like I earlier stated, Raul was much better than Rooney is now, so good that he left for a very good team in Schalke and helped them to 2 successful campaigns. But because if his status, he needed to be moved on to allow others behind him to also reach their potential. Personally, I don't think he can't do much better next season and making excuses, changing formations all the time to suit him, shoehorning will not make anything better. One game for England , the golden was finally put on the spot light, like wise in the good display against Germany in Rooney's absence, he was also up for discussion.
Mate, all good things come an end. I admire your support for him but it's only a matter of time before things change.