Turns out the team I'm working in (not above) really does not like change (i.e does not accept been-there-done-that-failed, as valid argument to do things different), looks down on 'business', often even on 'users' (technical pureness above everything else, above working software even) and most of all hates me for pointing out problems.
I'm still trying to find ways to fill my original 'problem' for which I came on board, but am also close to giving up, due to the negative energy all this is costing me.
So: good advice. But be certain the 'problem' you're hired for, is actually something that people want to solve.
Then I figured that just as I got rather vague direction on what I should do, there also wasn't anyone telling me what I should not do. So I started doing things in the intersection of being interesting and beneficial for the product.
So my advice would be: If there's no concrete problem to solve, find one that you like and be glad that you were given the freedom to do so.
But tbh I don't entirely see how it applies here