Are challenges still a challenge?

Nightmare difficulty levels are suppose to be hard and challenging. We are suppose to use character with suitable attribute and killer effect... Meanwhile characters like IchiGod can do any nightmare with a big amount of time left.

Sure, someone can say that he is the best character in BBS, but it is not that he is twice stronger than any other character. There are characters almost as strong as him, especially if someone have good items or soul traits. My ichigo had +40% SP from accessories and frenzy Byakuya, frenzy Ichigo and Rukia as soul traits.

Lately we got many buffs from new accessories and new release system, and next buff for our character is upcoming in next patch this months. Is this just me or game is getting too easy again?

EDIT: Here some explanation:

• I never said that having IchiGod means i am experienced player
• I am not complaining that IchiGod is too strong. I am complaining that one of the strong characters is enough to complete challenges like any normal quest. And thanks to recent buffs many characters is ridiculous strong.
• I don't think so everything in game should be easy enough to be completed by new players. That is why we have to separate challenges, normal and nightmare, right?
• No, i am not the P2W player, i just got lucky once and I've got IchiGod, that is all.
• You don't have to have IchiGod or Broken to find nightmare difficulty easy. To be honest, similar strength to IchiGod have Ukitake, and he is only one month younger then the oldest 6* characters.
• Completing current "nightmare" difficulty quest takes me ~2 min with IchiGod for other than speed attributes.
• It is not about IchiGod, broKen or any other character you (and probably I) don't have. It is about sending a message current buffs for all characters.