Chaos hunter is a good card, but its lost popularity this format.
Discarding cards is always a bad thing, especially with the hand control that most chose decks have. Also that card can only be special summon after a chaos monster has already been special summoned.
Chaos sorcerer can then banish it, pulsar can attack it head on, bls can really screw it over.
Although its good, losing hand control is really not good, i used to main it also and it screwed me over more then helped me out.
D.D. Crow is better imo, especially early game, you can lock down your opponent pretty quickly and its a 1 for 1.
Also chaos decks run stuff like trag and gorz that could easily deal with it.
I guess what I'm saying is nowadays its too slow, CDs are better handled with crow and electric virus or other 1 for 1 cards.
Imperial Iron wall also helps a great deal.