Living in Japan has made me realize how differently people view in-game behavior.
Things like corpse kicking, taunting, or playing around after you've already won are generally viewed much more negatively here than they are in many other regions. It's a cultural difference that's easy to overlook.
Atif has always had this style, even in online matches. This isn't something new, and you don't have to like it. I just think it's worth understanding that different communities have different expectations.
Personally, it's not something I'd do, but everyone approaches the game differently.