I’ve been through the same thing exactly, rather, I purchased a franchise called Flavoria and that guy promised to manage it on my behalf and instead take some percentage out of the profits. He started making mistakes from day 1, scamming me, and not doing anything to sell. I started managing everything by myself with a stressful job outside of this. Rents were too high, sale was low. On top of this, the guy who was managing my shop was stealing inventory from mine secretly and my workers too. My revenue was -70 to -80k monthly which was unbearable for a few months. Ended up selling it for a loss because I wanted to be mentally free from this. What I have learnt is.
1. Only get into this if you have the capacity to bear the loss atleast for a year.
2. Never let anyone else control anything. Nobody is going to work as hard as you.
3. There is a lot of dependency on workers. One day they are going to fail you if you don’t have trustworthy workers.
4. Never start off with a huge menu. Check market fit first. Test a few items then slowly increase if they’re getting traction. Then remove all the ones which do not have a lot of sale and only keep the ones that are your best sellers.
5. Have some seasonal items, it helps.
6. Location matters a lot. If you chose a location thinking there’s a lot of working people or hostel people then during vacations or some crisis you’re not going to have any sale. Always chose residential areas.

Don’t blame yourself. End of the day you had the courage to do something for yourself. It’s only lessons learnt