Can i make a complaint against the police?
File a complaint against yourself while you’re at it. The Police were doing their jobs while you were driving in an unsafe manner. Chasing a cyclist on the wrong side of the road and over a median in a van is not safe driving. If you had any legal grounds your lawyer would have been able to at least get things reduced. So take responsibility for your actions. It is not the fault of the Police that you are going to suffer for your actions, it is yours. I don’t see where you have grounds to complain. Especially if you’re going to plead guilty.