If it's taekwondo am I just seeing things or are his knees bent a little too much

Manhwa logic

Actually, this author often consults and talks with professional martial artist to make his comics as accurate as possible.
On webtoon, he always writes their names at the end of the ep in Viral Hit (how to fight, his other manwha) so i suppose he either did mistake here, or Johan just copied it badly or smth

Oh, thank you