Certain people here seem to not realize that working on a game regardless if it's full time or not, takes effort and a lot of time + planning.
You getting mad at the Dev for paywalling content or promoting incorrectly for a demo is entirely correct and accepted! ALTHOUGH shitting on the dev that is working on a small Project that is also very communicative with everyone and tries to reply any questions asked is just plain wrong.
You seem quite unhappy with the game and the dev, for such a "shitty" game you may say, but apparently you keep writing and coming back to continue your arguments.
That is not the way to go about in life, you can speak out and give constructive reviews, instead you just plain attack the dev for their work. Why don't you instead support them out? Or wait, maybe someone else has to do it and post it for free so you get to enjoy the free content?
Id advice at least to stop being an assh*le towards the dev, and go the right path about giving your concerns.
From the free demo i very much enjoyed and didn't feel the need to even try the paywalled content, after all what was presented to me was a good demo, and that is my opinion, however you are also free to give your opinion but i don't understand the need to shit on the dev that is working on the issues and making it possible for everyone to enjoy a demo.
Want paywalled content? support the dev. If you don't like the game, than move on and find a new game.