Read your OP and all follow up posts in the thread. My advice is take 2 weeks vacation (travel somewhere), and do not work during this time. You need to step back and digest what you’ve learned so far. Don’t feel guilty about taking this time, it’s necessary for making an important decision.
If you come back after 2 weeks and feel the same way, shut it down and return funds to investors. Your investors and advisors are very very naive (how did you raise 220k as a solo founder with no product? How did you spend 120k in 9 months!?) and it would be unethical to take advantage of them by continuing in something you no longer believe in. You’re closer to the business than they are, your judgment about whether it’s time to pull the plug is more accurate than theirs.
On the other hand, if you come back with a fresh perspective and want to keep trying, do so and inform investors appropriately. And try to reduce your absurd burn rate.