Can't comment on the business side of things and how accurate that is, but a lot of his complaints are uttery absurd. The whole thing is just extremely poorly and unprofessionally written as well, and it seems like he's just trying to find
anything he can no matter how valid it is.
He claims GW are IP thieves because they used non-copyrighted themes and concepts from other property, and thinks they need to pay for the use of ideas like the vague concept of "space marines". He basically says "They stole Battletech, then stole "Space Marines" from Starship Troopers, then later on stole Xenomorphs from H.R. Gieger!" (the original Genestealers are "Identical to Geiger/Fox's images and vision" according to him) and uses the exact words "stolen game" later on to describe W40K. He even claims that gamesworkshop stole WHF as a "110% Ripoff" of Tolkien because they both have things like Dwarves and Orcs, regardless of those things being a mainstay of fantasy settings and made popular
because of Tolkien. Not to mention other settings like D&D had those things before WHF even existed. He even says they stole the word "Eldar" from Tolkien. After all that he says they copied "exact sculpts" of Dracula, Frankenstein, Werewolf, Mummy from universal (no idea how valid that is, though).
It seems he doesn't understand the difference between parody or being inspired by something that isn't copyrighted/is just general non-unique concept and outright IP theft. He seriously believes that GW are thieves because "they never legally paid for" the things they were inspired by when making their own setting, despite them being entirely different other than the basic concept. You don't need to pay to use basic concepts and non-copyright/trademarked things like Dwarves, Orcs, Elves, power-armour, lasers and dropships but he seems to think you do.
Some of his business complaints
might be valid but i don't really understand them all. When he's using words like "scam" "criminals in England" "stolen game" and all sorts of absolutely stupid and petty things it comes across as either has has no idea what he's talking about, or it's a troll thing. How can he say this and seriously believe it?
In America we have a Free Enterprise & Free Market system of law .... different than the socialist-base of Europe.
Also seems to be some sort of strange double standard going on here, as if GW are the only company to borrow ideas from popular sci-fi and literature, or as if GW are the only model/miniature company to charge many, many times the cost to produce. Tamiya or Dragon or Airfix or whatever don't use materials that cost them anywhere near the product price, either...but his complaint is made even more silly considering he used something that was a commemorative limited-edition miniature for an anniversary, anyway. It's as if he thinks thigns like the moulds, design, transport, customs etc don't factor into prices, either.
He even wants GW to
loose all their IP, trademarks and copyrights. The entire thing just seems like a joke but i expect he's serious, unfortunately.