Gaming Chair Racing Office Computer

Title. I sit like an absolute gremlin. Like we’re talking L from Death Note for a large part of my evenings. I tuck one leg fully back, perch like a gargoyle, etc. I’m also 6’4” 170, tall and skinny. I picked up a steelcase gesture that felt awesome in store (and I LOVE the arms) but after a couple days I feel like it may not be the right fit, i feel like i’m constantly fighting it so far. I hate the lumbar support, I love to slouch since i’m on my feet 8-12 hours a day already for work. For context I had a cheap GTRacing chair from amaz\*n (had to censor because reddit mods think every sub needs 2836262 rules) that only wore out after the leather seat started falling apart. so with my wack posture in mind, should I give the gesture time? the office supply store will only do store credit for a return, so I’m locked into traditional office chairs, unless I resell on FB marketplace or something and eat a small loss. Should I try a Leap V2? should I go back to the racer bucket style I loved? Help :(

Need to replace my old chair as the back support is slipping and letting me fall back when leaning back. Does anyone have a good recommendation for a US based dude? I've done a bit of looking around on this thread and saw you shouldn't buy a gaming chair so I wanna make sure to get something good with what I have to spend, my budget is around $250 or less hopefully, so far on the list are a few gtracing chairs for the office chair type like the CH910 and a few from walmart that are discounted but look decent, if you have something that seems like it's a better option at that price range please leave a link and your opinion. I'm a larger dude at around 6' tall and 300lbs and do a lot of gaming and editing at my computer and unusually for a dude have really broad hips and need a chair at least 21 inches wide or i can't sit in it comfortably.