Resolved using Ublock origin an masking the spinningContainer (the spinner that apper when you load page contents)
My list for an unbloated youtube experience:
www.youtube.com###guide-content
www.youtube.com##.size-small.style-suggestive.ytd-masthead.style-scope
www.youtube.com###top-level-buttons
www.youtube.com##.size-default.style-destructive.ytd-video-secondary-info-renderer.style-scope > .ytd-button-renderer.style-scope.yt-simple-endpoint
www.youtube.com###continuations > .ytd-item-section-renderer.style-scope
www.youtube.com##.opened
www.youtube.com###dialog
www.youtube.com###spinnerContainer
www.youtube.com###guide-wrapper
www.youtube.com###guide
www.youtube.com###start
www.youtube.com###end
www.youtube.com###menu-container