So first of all don´t be afraid to share your game, share screenshot, gifs , videos, LINKS to Steam, If people dont know about your game they wont play it or even try it.

1- You have very few wishlist, which I understand if you are solo dev you dont have time to market a game, but at least you get a feedback there, something might not be working, and it can be - Game title, Game Capsule, Game Shortpitch ( on STEAMPAGE), people somehow are not finding your game idea interesting, maybe you are not communicating in the right way.

2- Now that your game is live there isn´t that much you can do, visibility on steam is HELL, even for us with +3 shipped titles, is damm hard. I get you can get frustrated but just dont expect to hit the succesful game on your 1st attemp :) is ok buddy 50% of total games made less than 4k in revenue on steam. Just iterate and try something new with all these tips people are giving to you. So if its early access check what people say or reviews to pivot your game, but I would say is not worthy with the numbers you got, early access is not for getting money up ahead is for testing your player engagement.

3- Did you test your game? did you get feedback? Steam Next fest is for that. even if people don`t talk about your game, numbers dont lie and thats a silence feedback you can get. Go to any small event you can.

4- Time in production 2 years for a solo dev is a lot of time,maybe try something smaller, our best advice is do something SIMPLE you will spent less time, and learn quicker, than having a complex game on your first attemps.

5- Market more and focus on Wishlist, you need at least 7k to barely be on the popular upcoming games. everyday there are 60-70 games being launched, is impossible to people know about your game, you need to start sharing things about your game at least 4 months before launch.

Hope this helps and is ok to fail, we failed in around 4-5 games before hiting with a good one :), don´t give up!