Interior latex stains

I have had a problem with paint peeling from all wall for years (large areas and small patches) . . I was told that I had used a cheap primer or the builder did not use any primer years ago. The problem is even in areas that I have scraped off the paint and gone down to the bare plaster board (PB)it still happens.Some times I was able to scrape off (paint) in 3-5 foot areas on the PB. In areas that I even had to fix the PB in the past it has happen again.I use to have hot air heat now for the last 5-7 years I have hot water base board heat. It has happen mostly in the front of the house that gets the most sun and usually is the warmest (living ,dinning,kitchen rm). It has happen to outside walls and inside walls. I have in the past even tried to use oil based primer before painting but that has not really solved the problem. Any ideas other that burning down house and starting all over.

I will be painting the doors and trim on the interior of my house soon and was wondering what type paint and what finish would be best.Oil based? Latex enamel?Gloss? semi gloss? Any input is welcome.