Main thing: solve problems, don't fight them. If it appears you must fight really, really hard to fix an issue and there isn't a clear way to move the needle without potential work, move on (avoid sunk cost fallacy) and figure out how to avoid the problem all-together.

That could mean: hey the product in this respect isn't working and we don't know how to change it. What happens if you change the business model? Customer acquisition strategy? Product strategy? Everything is always on the table when in search for P/M fit, so don't get too locked into a solution. Dial into your problem.