The actual real shit you've done is inversely proportional to likelihood you're gonna chat a big game, ignore hits, get angry, shout at people (on both teams) etc. I think most people can imagine why. I say likelihood because I've known one slight exception but he'd just huff a lot to people he knew and quit games sometimes, not actually get real angry at strangers mid round.
I think when you look at pure airsofters vs cadets vs regulars at different levels most folks will have seen this to be a trend. Airsoft weapons and ordnance are nothing like the real stuff so the tactics/marksmanship mostly don't work and if you lose at airsoft it doesn't matter at all we all go home, most people know that, but chances you'll actually care about the game might be a bit higher if you lack the real experience to know how insignificant a little sunday afternoon bb war truly is in the scheme of things.
As I think about it, I come to the conclusion it's more down to what you think airsoft is. The worst players overall I've encountered or see online tend to be far too hard in to milsim, maybe did basic training then left the forces or just straight failed basic, have/have had some military mates who they quote all the time, imitate the lingo and/or or got a like on IG from an ex-SF guy one time. Either way, the more of a fantasy about the game someone builds up in their mind the more unpleasant they are to be around.