You don't seem to be open to criticism. You make excuses instead of straight up accepting it.
I was never expecing a polished game, but I was expecting a playable game. A game crashing is a no go and it is unacceptable that such a fatal error made it into the release. You can't just ignore that and blame it on the engine. You could have asked your family and friends to play your game and give feedback. If you don't find people online to test your game, ask people you know. It isn't that hard.