You can remove recommended content by selecting "Not interested" on your home page, this will influence how YouTube suggests videos to you in the future. Here's more about managing your recommendations: https://goo.gl/mfD7rf
Have you tried clearing your watch & search history as this also influences your recommendations? Here's how: https://goo.gl/Sq43HM . Also, here's the link for watch history: https://goo.gl/Kvmuis . Hope this helps.