My bathroom walls are in as shape after removing wallpaper any suggest

Scrape loose paper off with a putty knife. If you have any pock marks you may need to put some spackle on those spots and allow to dry.

If you have oil spots cover with Killz. Let dry.

Then put on a coat of flat paint. Let dry.

Cover this with semi gloss paint of you choice.

You did not say, are we seeing smooth plaster here with a few lingering pieces of paper? You should continue with your wallpaper remover until you remove all of the wallpaper. Or are you showing us something else?

If the surface has been cleaned of all loose paper and it still does not have a paintable finish, your next course is skim-coat plaster over the entire wall.

Its a lot of work especially since it was not done right. In order to remove wallpaper in one fell swoop, one must use a steamer and soak the paper with Vinegar and water solution using the steamer and a scraper to get down to the glue. This picture is (I believe) the backing of the wallpaper and the glue too. So now, Spray your walls with the vinegar solution and if you have a steamer use that too, and scrape the paper and glue off slowly.

It almost looks like the wall was not prep right to start with. Wall paper was applied to directly to the paint without using sizing. Sizing improves the surface strength, printability, and water resistance of the paper or material to which it is applied. You can try to clean all the paste off, unfortunately the more water you use may losing more of the drywall paper face. But, if that works with minimal damage than you can start the repairs. Let the wall dry completely, Next, get a hand held medium grit sanding pad lightly sand over the areas were the drywall paper was torn away, this should remove any lose paper. Next, start patching the holes and areas were the drywall paper tore out with light weight taping compound, apply let dry and lightly sand until there is no more compound on the paint only in the patch. you'll need to repeat this process two more times, because compound shrinks as it dries. Happy home repairs.

You can also add texture to your paint or buy it already textured. That will cover up all the mistakes. I did this one time and it came out great.