Wow, pretty impressive demo! You frontloaded by saying it wasn't gonna be polished or anything, but I felt like what was shown was already quite polished: animations and graphics were very lively and cute, combat system was deep with a lot of interesting strategy and characters to choose from, and so on and so forth. All around it just felt very well put-together, with the thing I liked the most about the game was how intuitive the interface was: while I felt like the initial tutorial was a bit too much to grasp at first since it just dumps everything on you at once and I feared I was gonna miss something, it was great at how helpful the game was in letting you hover your mouse over practically anything to get a tooltip to see what it was. There were some small things that could be fixed up here and there, such as how sometimes the effects from combat would happen too fast for me to realize the full effects that just occurred, but from seeing how it's already going I think you're on a good path. Looking forward to the full version!
As a silly side note, I hope you're having a good time developing and that the whole toxicity aspect is just for fun and not to be used as a shield against criticism or anything like that: it can be rough out there but I hope you're able to stay with a healthy outlook and sort out the good feedback from the bad. I just don't want this to be a "oh you didn't love my game? whatever, you're just a hater" thing instead of realizing what might seem likely overly critical feedback deep down is trying to be helpful...eh, I'm overthinking things.