No matter what you do there will be always people not happy with anything you do, the price (if you sell your game) the use of default assets (for any engine I guess) or anything else, just listen to yourself and try not mind the haters but I understand that it is disappointing whether it is on steam or itchio ( i guess it is like that everywhere?)
default renpy ui is good already just like default assets in rpg maker :)
I've actually not run in to a lot of "default assets = bad" mindsets here on itch.io, pretty much everyone has been very supportive and any criticism I do receive has been mature and constructive. People here are chill, which is why I love it here. ^^
Thank you for your kind words, I am trying to focus on making sure the game is how I want it and not how everyone else wants it. As long as I'm happy with it, the right audience will show up. Its just a matter of getting those thoughts to match up with my feelings. ^^;
