it is kinda cheating imo. i mean its alright to use a little shaker loop or whatever but not as your main drums.
why are your beats sounding bad? selecting the right samples, and pitching them up and down is the first and a very important part to get them to sound as part of a single kit and not just random one-shots.
Also, unless you're going for a stripped back minimal beat, dnb beats have a ridiculous amounts of layers; hi-hats, hi-passed breaks, percussion etc. some of which you couldnt pick out unless solo'd.
Depends on why they arent sounding good though, if its arrangement, id try and listen to a few grooves you like and try and replicate it. After a while you get the hang of knowing what will work and shit and it starts to come naturally. Its all about details though...so many tracks have that standard kick--snare-kick-snare beat, but it still works cause they all have a different groove and shuffle and timbre