How long have you been using the Digitakt at this point? I would suggest maybe just making songs with only it for a little while if you want to try to speed up your comfort level with it, I suppose it still might not click for you. To me the Digitakt is the fastest drum sampler type device as far as fine tuning your one shot samples goes and working with slightly rougher samples, most other options to me feel like they work best with really well curated sample libraries and already polished sounds as apposed to quickly designing a drum sound on your synth sampling it and fine tuning it on the Digitakt to get it nice and snappy, a bit of a resonant filter envelope and overdrive to make it bump.
That said we all find are own paths with these instruments, if you’re not feeling the Digitakt and feel you gave it a fair shake there isn’t a huge reason not to explore other options if you got the time and money. You can always sell the MC-707 get a Digitakt again or move on to whatever other product you fancy. Best not to stress it too much, just try to be happy and productivity will often follow.