Yea, my hatred for SuperNova knows no bounds. Chaos, and the other "boss" songs like it are Grade-A examples of what I like to call "Pretender Syndrome". Before SuperNova came out, DDR's last game at the time was DDR Extreme, and after that, there was a FOUR YEAR gap until SuperNova came around. In between, ITG (In The Groove) came out, which was basically a love-letter for the hardcores that wanted something a bit more "challenging" than what DDR was offering. Konami must have seen them as a threat (even though they won the lawsuit against them after ITG2 came out), so rather learning from what made ITG popular, they decided to ape them in the worst possible direction by making the boss songs so gimmicky they become almost unplayable. To this day I STILL can't get the timing down on the pauses to Pluto, which was another stupid gimmicky boss song that appeared in it's arcade sequel SuperNova 2.
Although, ever since I made the move from Singles to Doubles, I've noticed some older DDR songs have really dumb doubles charts that require you spinning around unless you double step (i.e. using one foot to hit two arrows one after the other). That, and the fact that someone thought PARANOiA Eternal's single heavy chart on DDR5thMix was a good idea just means that Konami was ALWAYS incompetent to begin with. Trust me, if given the time i could go completely autistic regarding the entire series as a whole.