Welcome to the world of making software for random people, almost certainly made worse by she being a woman.
As others pointed out, most people do appreciate it, but they tend to be silent about it, whilst a small minority are demanding little whinny bitches (in a non-gendered way) who think they're owed service and some are even trolls.
To those reading this, I suggest when you get something you like for free you at least give some feedback that you liked it and, if the person has some kind of sponsoring scheme going on and you really like it, consider contributing, if only to incentivise more of the same.
Those on the other side are people too and they will appreciate it.