ah. When I read this, I thought otherwise:

I wasted my time solve language problems more than solving Kata

Do I have to spend a huge amount of time on their decision?

not really sure what's your question there. "Your call", I guess? You can forfeit them, or just let them adise until you find some "inspiration" about them.
...And some kata are... "bad", yes. So if you think you stumbled on one of those, just skip it.

so, why are you complaining, then?? x)

I know, but that's actually not what is "enough", here. ;) So don't complain about you doing more than necessary when it's actually not required. ;))

actually, you're not supposed to go that way, to solve this task... ;o