antrad88: Yes, but I could slowly block channel by channel and my suggestions were starting to look normal, now I have no means to defend myself. You can clearly see YouTube algorithm pushes the same popular individuals and I can't get rid of them.
If I may be blunt I think you're overreacting just a bit.
Also: What if someone uses such thumbnails but makes content you might/would enjoy? Then you'd miss out potentially on some otherwise good channels.
Most times on YT some people need to use such thumbnails to draw in a crowd(along with certain words in their titles)....else they wouldn't get as much exposure to their content.
Sure, some channels are just clickbait worthy of hiding(those top 10/20/etc lists only type channels, for example), but not all who use such tactics produce cr*p content, from what i've seen.