If you use uBlock Origin you can remove most cruft by adding these rules to Settings > My filters:

  youtube.com##.ytp-ce-element
  youtube.com###hover-overlays
  youtube.com##yt-icon.ytd-badge-supported-renderer
  youtube.com###related
  youtube.com###donation-shelf

Thanks I tried it out and the setting is called "Hide Inapt Search Results" (it's on by default but it also disables recommendations everywhere by default so you might need to disable the other options).