When I'm working with my clients to help them figure out what they want their career path to look like in the future, I like to focus on the positive side of it (What do they want to create?) rather than the negative (What do they want to avoid?).
In reality though, what they don't want in their work often seems to be more readily accessible than what they do. It's where the discomfort and pain has been, so it stands out. Rather than focus exclusively on what they don't want, I have them use that as a springboard for positive insights.
Try this. Make a list of things you know you don't want in your work - things that stand out as irritants from your present and past - and for each of those ask yourself "OK, what would I want? What would the situation look like in my ideal world?"
With just a bit of extra thought and effort, you can take a list of negatives and transform them into a list of positives you can set you sights on as you move forward.