Removing wall paper is beating me

Score it, soak it, wait. A scoring tool makes lots of small holes so water can get behind, then spray with warm water with a dash of fabric softener or washing-up liquid and leave it 10-15 minutes. It should then come off with a wide scraper. If it's painted over or vinyl, rent or buy a steamer - it's slow but it works. Go gently with the scraper, gouging plasterboard is the thing you'll regret.