Before giving up, I recommend testing two paths to validate whether there's real opportunity or not.
1. User Research: if you haven't already, reach out to your user base to get real input and guidance from them on how they use the tool, the value they see in it, how they would promote it and what $ they would pay for it log-term. I recommend doing this a 1:1 conversations on a platform like Zoom so you can chat live and record the conversation for further review. You'll likely uncover some gems on positioning, utility and organic marketing opps. You'll be surprised how much people love to participate in these kinds of sessions as it's a validation for them and stroked the ego a little bit.
I would lead with a personal email invite asking for the time. If that doesn't work you can always default to a survey.
2. Rethink the solution. Take academics out of the picture and strip back to the basic functionality, features and solution you provide. What are other verticals or user audiences that could benefit from it? What are competitive companies doing in that space that you could improve on or offer something totally different?
3. Bonus thought...look back at your competition. What are they doing that's driving their success? Sure, they make have an inferior product from your POV, but they're doing something right to be winning. What are they doing that's winning? Can you emulate that at all as another final validation on the vertical and audience?
Good luck!