should i feel bad for using the amen break
I have always wanted to make Dnb but i have issues making breaks so i chopped up the amen break.
You should only feel bad for resorting to the most used break ever. 
Lots of good samples out there, try something new too if you have the time.
You shouldn’t feel bad about it - it’s everywhere!
But if you can chop up the Amen break, surely you can chop up some other fantastic breaks out there too! 
no you should make whatever you want
There are no rules in art brother.
Used creatively, anything goes!