Maybe my song “How can one raindrop make a tide” is useful to you? All drum sounds were derived from a very basic drumloop, shipped with a Camel Audio sample pack. As there were no effects allowed other than basic EQing or Camel Products, i was forced to try out various things using envelopes on drums. It’s kinda glitchy and not really breakcore. The XRNS is available in this thread too, just scroll a bit down or grab it from my website.
https://forum.renoise.com/t/beatslaughter-how-can-one-raindrop-make-a-tide/20434
Another thing i often do to get weird rhythms is playing a drone or athmo on a low key and use sequenced filters on top of it. You could simulate such thing in Renoise with building a chain of FX and using steppy point automation on various parameters to taste. Also a way to get unusual sounds is slapping shitloads of effects on the master bus of your old unfinished songs and recording the session in the background. Then cut out the nice bits afterwards. You could also hunt down field recordings and cut things out of them, like steps on stairs and the like. Here is a nice colllection of field recordings available as download: