Gaming chairs are the worst and are so overpriced it's ridiculous. The key is to get a genuine office chair.
I second that. Most "gaming" chairs made to resemble racing car seats are neither very comfortable nor fine adjustable. They may look cool, but their usual headrest/backrest design is meant to support
HANS devices (head and neck restraint) and hold the driver in place during sharp turns - neither of these features are needed for a computer chair. Their lumbar support is also very basic - typically just a small cushion on a strap - while real car seats have built-in, freely adjustable lumbar.
Originally I want to get an ergonomic office chair (with netted back) but I cant find it
I wonder why only ikea selling ergonomic office chairs in here
I suggest you to look for PU leather '
executive' chairs, if you can't find a cloth/mesh '
office' chair - though the latter are far more confortable, especially models with mechanically adjustable lumbar and headrest; some top models will also let you adjust seat depth.
And if you tend to lean back in your chair as much as I do, you will appreciate a
knee-tilt mechanism with synchro seat plate - i.e. where both the backrest and the seat are reclined in sync with each other (though at different angles) and the pivot axis is located directly under your knees. Typically it's also possible to lock the backseat at any angle of reclination with the left-side lever. This feels as good as real car seat.
BTW of all the computer chairs I tried in local stores,
Samurai S-3 was the most comfortable one; I doubt this specific model is available elsewhere though. That said, these days most office chairs are assembled from generic parts on a few large Chinese factories, and there are generic-brand variants of a very similar (though slightly less advanced) design. It's worth a try to look for similar models in your local stores.
I've also checked the IKEA
MARKUS and IKEA
JÄRVFJÄLLET chairs and they are fine, but have their drawbacks - specifically, MARKUS uses a knee-tilt mechanism but headrest and lumbar are not adjustable; JÄRVFJÄLLET has adjustable headrest, lumbar, and seat depth, but uses a less convenient center pivot mechanism; and both can only lock the backrest in either fully straight or fully reclined state, but not in any intermediate position.
Also the
IKEA POÄNG armchair felt very comfortable to me, but it's not really designed for desk use.
Examples of PU leather 'executive' chairs:
https://www.newegg.com/p/1YC-000J-000R7
https://www.amazon.com/MAISON-ARTS-Executive-Ergonomic-Computer/dp/B08Q87F1SK/
https://brabix.info/catalog/kresla_dlya_rukovoditeley/531826/
https://chairman.ru/goods/boss/boss_414.html
https://chairmanshop.ru/goods/boss/chairman-460.html
Cloth/mesh 'office' chairs:
https://www.metta.ru/en/catalog/samurai_t/samurai_tv_3_05/
https://chairman.ru/goods/boss/boss_427.html
https://www.defo.ru/catalog/kresla-i-stulya/kompjuternye-kresla/tokyo-2-0-mb-eco/?offer=105496
https://www.defo.ru/catalog/kresla-i-stulya/kompjuternye-kresla/tokyo/?offer=85119
https://www.amazon.com/dp/B017V4SVLC/
https://www.amazon.com/Regency-Solace-Leather-Chrome-Swivel/dp/B008Y9ENX4/
https://www.amazon.com/hjh-OFFICE-720024-Executive-ergonomic/dp/B00O09ZHG4/
https://www.amazon.com/Multi-Function-Ergonomic-Adjustabl-mechnism-Headrest/dp/B01094WDD8
https://www.madisonliquidators.com/new/modern-gray-mid-back-conference-room-chair-with-arms/3810/
https://www.houzz.com/products/high...xecutive-office-chair-black-prvw-vr~131104712
https://cecilnurse.co.za/product/magnum/
etc.
Metta Samurai S-3.04
https://www.metta.ru/en/catalog/samurai_s1/samurai_s_3/
Knee-tilt, synchro seat plate mechanism
https://www.hnfshop.com/shop/chairs...tilt-mechanism-control-base-799928952460.html
https://www.amazon.com/HnF-shop-Office-Mechanism-Control/dp/B07JFL72F8