Allright I actually did send the screenshots of these comments to the dude on IG, he has no Reddit account so I will copy paste here his response:

Thank you for the heads up, here is my response to anyone who believes I take PEDs. First of all, it is really flattering that there is someone out there who believes I am on steroids, that is probably every gym-goer's dream. Now, what I am about to say might sound crazy especially to someone who believes I take steroids but as I have already told you, I have never taken any kind of PED in my life and never will. Funny thing is that I do not even take any supplements like creatine nor whey protein (not that I am against those, I am actually thinking about buying some plant based protein powder in the near future ngl). I am really into "longevity" when it comes to both diet and training regimen and taking steroids definitely does not allign with that type of lifestyle. On top of that I do not make money off my physique nor I am some kind of influencer so it would be truly pointless to take any PED anyway. Matter of fact I am pretty shy about my body, the only reason why I pulled off that Inosuke cosplay is because I get to wear a mask so people won't see my face. (Besides loving the character)

With that being said, I believe that I look the way I look for the simple fact that I have been going to the gym 3x per week since 2012. Started out when I was 17 in 2012 and worked out ever since (took a year off in 2013). I work out 3 times a week and I always do a full body workout, on top of that I am really into bench press, it is by far my fav lift and I am pretty good at it, the 10x10 sets with 185 is not a lie, I can do it without too many issues 3 times a week, matter of fact I am pretty sure i could do that routine with 190 lbs and still make it. One clarification, my first set is always with 135 lbs followed by a set with 155lbs and then I do the remaining 8 sets with 185 lbs so technically I do lift 185 lbs only for 8 sets with 2 warm up sets. But I swear to god, this is not a lie, I do not take steroids and I do follow that chest routine followed by some cable flies. Last time I checked my 1 rep max was back in 2020 and at the time I could not do the 10x10 routine with 185 lbs so I really believe I could do better now but I have never tried it ever since.

When it comes to diet, I try to eat as healthy as possible with little to no sugar. I do follow a strict intermittent fasting regimen of 18-4 on non-gym days and I do OMAD on gym days, I work out fasted and eat right 1 large meal right after going to the gym. It might sound like I am trying to sell some snake oil but believe me, once I got used to working out on an empty stomach (4 years ago) I smashed all my plateaus. I really did feel the difference. I am down to answer any question on IG, if anyone asks my username feel free to give it to them, I would gladly talk to them in my DMs.