I remember reading an article where the author explained why telling this is free, you can fork, or send a pull request instead of complaining is a form of ableism.
An analogy, which is not 100% accurate, which I used to explain it to ither people is, "it is not very different from a carpenter telling you, 'the wood is here, the tools also, you can do it yourself it you didn't like what I did'.
The point is software development is a skill. Not everyone can have that skill. It takes training and practice to be good in the craft. A user of the product does not need the skill to operate it. Never think it is okay to tell people "just fork it" or "why don't you send a pull request instead of complaining?".
At the same time, I completely acknowledge that there are some entitled assholes who don't understand or care about the open source philosophy and how it works. I just wanted to point out that asking to contribute or asking to fork is not the right way to address it.