Greasy Fork is available in English.
Hide videos of blacklisted users/channels and comments
It hides videos from users/channels that have been blacklisted from home, searches, related, and comments
Put a * at the start of a word to use it as a wildcard (only in the blacklist): It will find the word no matter where it is in the username
It is not case-sensitive
Don't forget to save
You can open or close the menu in two ways: either by clicking on 'B' or by pressing Ctrl + Alt + B.
pause: To temporarily pause the blacklist. To turn it back on, just click on it again or reload the page
separator: The symbol that separates the usernames. The default is a comma, * and " aren't allowed, min-max 1 character
timer: How often the script checks for new elements on the page. The default setting is 1000 milliseconds, min is 500 ms. You need to reload the page after saving changes
comments: Hide comments option. You need to reload the page after saving changes
pause video: From a direct link to youtube, it will pause the video if it's blacklisted
right click add: To add [x] buttons in front of usernames that can be right-clicked to block them
Please note that I usually only test the script with Tampermonkey on Firefox, and that I won't install Chrome on my computer. This means that I may not be able to replicate the issues you are experiencing. Sorry.
Also, the script may break if YouTube makes any changes, and I can't fix it until it changes for me too.
Moreover, I no longer use this, so it may take me some time to notice when it breaks.
However, you can adapt the script to suit your needs. Feel free to post your own version on Greasy Fork. I don't mind.