Thor is quite a powerful synth so there should be more stuff for you to experiment with...
My first suggestions (if you haven't done so already) is to go through the factory patches or download some new patches and deconstruct the more interesting ones and find the techniques which make the sounds more interesting.
Secondly I've often found myself limited because I always try making the same sorts of sounds (multi saw leads, reeses, etc) but instead try making completely different noises which you wouldn't normally go for (maybe bells, percussion, dissonant textures, etc), even if you don't use them you might find some new techniques which may be useful later.
Third suggestion would be to have a good fuck about with maelstrom if you haven't pushed it hard yet, it's a bit more quirky than the other 2.
Finally if you're exhausted all those suggestions maybe trying bouncing some of your patches and loading them up into the NN-XT and experiment with what can be done with resampling.
If not of that works maybe try a new synth
