I disagree with the general vibe of all gaming chairs being crap.
It's like saying that all Computer games are crap because they are made by cheap china labour for mobile market.
It's actually sad that even bigger outlets like Gamers Nexus don't actually have a fair look around.
Obviously if your are buying a 300€ gaming chair, you are going to get crap. And if you are buying a 300€ Computer, you also get crap. What do you expect?
But there are also good chairs out there, and yes, they are more pricey. Several years ago I bought a DX racer, wasn't a great chair, but it was pretty decent. It's basically the low end of decent chairs. Secret Lab and Noble Chairs are in the Mid Range. From what I heard of Secret Lab they are generally quite decent.
But then their are also High Class chairs. I personally bought a "Game changer" some years ago, which was a terrible mistake. And thats where the issue comes in: You usually have limited option to test features and press is often very biased (on the one end they just say its all crap, and on the other they seem to just run promo, Backforce is another case here, can't judge if they are good, but while they get good press, the feedback I read so far was rather bad). Especially longevity is important and can also not be tested on a day. My chair was fine the first day, and then when the days and weeks went by got worse and worse.
That said, there are other premium chairs. Such as Recaro. They are also doing chairs for Mercedes Benz and Porsche. I am not sure but they might be Europe Only.
There is also lfgaming, but I think they are Americas only. And they go for 1500$+
There are various classes and qualities of everything. You can't just buy 5 gaming chairs of 500$ or less and then say "look they are all worse than this 1500$ Herman Miller Chair. Conclusion: All Gaming Chairs are crap."
PS: I also tested 2 Ikea Gaming/Office Chairs (dont remember their names), but they felt super cheap, and they were lacking features and were the wrong size for me.