Ole has come in for criticism in the last few weeks from RVP,Gary Neville,Berbatov, Scholes,Roy Keane, Rio F to name a few. Plus of course people like Martin Keown and Ian Wright.
All these people know nothing about football.
I can see you are taking differing opinions very well.
Most of the criticism has been about things that he is not responsible for, so is pretty narrow minded and isolates individual issues. But if you want to listen to what most of these people are saying, the main ideas are that he needs to be given a squad of players that he is happy with in order to perform and time to show that he can get them to perform. Most of those people are primarily criticising the club as a whole.
I know for the majority of the season he has been saying (as he needs to externally) say that he is happy with his squad and we are improving blah blah blah. But if you look at the actions of the club you will see that they are looking for a striker, they are looking for a CM or two, and they are looking for players that are young and who fit the direction he wants to go in. And they have slowly been getting rid of those that are not up to it.
If you think that changing a manager will help, then you only have the last 6 years to show you it doesn't help and that the clubs who have had consistent managers / club strategies are the ones that are doing the best.