But PR means a permanent coalition of nearly all parties, so no government can govern without asking permission from the other parties. Ergo, you cannot get your legislation through without a fight. It's a bit like a government governing with a permanent minority.
Not neccesarily a bad thing. The less governments do, the better life generally is.
Do we really need a government anyway? We have that establishment in Brussels to tell us what to do, don't we?
Unfortunately so. I'd prefer none of them and less of ours.