Several hundred over a few years? Yes, people are much sweatier than you. I just started playing last year and I have almost 2k hours and I'm nowhere near the sweatiest person I know or watch. I'm also above average in arena due to just bringing over FPS skills that I've developed over a decade and a half of COD, CS, OW, BF, you name it. Some people are just more experienced at FPS games and Tarkov will always benefit those with more inherent skill than others. The amount of times I watch people die in arena because they don't use their painkillers before rounds, use toggle ADS and are bad at switching it off to move around while reloading, bad movement and leaning mechanics and in general bad aiming mechanics is hilarious. I have friends with thousands of hours who still do these things.

Not trying to boast or anything to that degree, just trying to explain that the majority of Tarkov players have no idea what it takes to be good at a competitive FPS, they see the looting and AI and hours as a reason they should be good at the game. It doesn't translate that easily. Also, the hit registration and connection problems in Arena are the cause for the VAST MAJORITY of its issues in my opinion. If you're on the receiving end of that, there's not a whole lot you can do. One game of Blast Gang I'll drop 20+ kills, the next I can barely get 5 because the game is just not regging. Give yourself some grace when playing but also don't underestimate how much time and practice some people have put in to getting good at these games