I have a gaming niche site that is around 4 months old. I first got traffic via yt but then it got impossible to keep the vids up so I quit. I decided to check whether any of my pages was ranking in G and it turned out that several kw-s were in top 50. The funny thing is that all the content is duplicate on the site. Every post has the same text but the game name is only changed. The posts are around 400 words. Should I rewrite the articles on the site or should I keep them as they are and start building backlinks?