Can you use interior satin paint on hardiplank?

Can you put a semi gloss interior paint over a wall that was painted with a flat paint? I am painting one of the bedrooms in my house with Valspar Signature semi gloss finish paint. What I am getting is spotting or something you can see the roller marks on

I just finished pulling down the old paper (at least 20 years old) and most of the glue stayed behind. So did the mold and mildew. What is the best way to address this and prep the walls for paint. This is in a small bathroom…..