Alright anons I have a Tampermonkey script for you.
Short: It is a work around for the borked thumbnails.
Long: For some reason all of the src attributes on <imgtags are blank for images hosted on media.8kun.top however the link to them works fine. So this script just copies the good link to the blank src attribute (it checks every 10 seconds). Embeds and mp4s should remain as they are.
Note: This will only work if you have working media.8kun.top entries in your hosts file.
Note: This is not a fix. It is a work around which could easily be worked around itself by whoever is fucking with the code on 8kun's side.
Below is a link to the code. Requires Tampermonkey, obviously. Create new script, paste the code below, save then reload the board.
https://controlc.com/bcc01dc4