Potential history was my least favorite history tuber , his gup videos were mildly interesting but read like a wiki or reddit post , and his "germany could not win ww2" series was , as mentioned in op , anti wehraboo cope that ignores any and all possibilities of germany winning just to own le eval natsees!
But his worst sin is his non existent upload schedule , he has at least 3 series on his main channel that have yet to be capped off and he hasn't uploaded in 5 months and hasn't updated his patreon since December.
I didn't see him in OP so if im blind i apologize , but armchair historian deserves to be talked about too , from his average shit tier YouTuber "hurdur youtube is killing my Channel guises" to his shitty website he charges people money to see slightly edited videos and original content , to the now lost 9 to 11 minute video of him ranting about why he needs to censor and charge for his site and why he doesn't have a patreon. (He claimed his videos cost 3 to 5k to make and that he has a large staff , sorry I didn't archive the video)
To note , it used to be free to watch the uncensored versions of the videos on his site , he changed that with the release of his "life in occupied poland" video and retroactively changed that with all of his videos , im guessing that prompted the video i mentioned.