The reason is stated both in the rejection email sent by YouTube, and on your monetization page in YouTube Studio. If you’re complaining because it only states your channel doesn’t comply with the Channel Monetization Policies, these words appear in blue to indicate they are a link to those policies.Click the link, read the article that opens, and rate your content against those policies. It’s your own job to figure out where you went wrong in your content creation; not ours to hand-diagnose your videos.And by the way: downvoting the truth, doesn’t make it any less true.