Please read my entire comment, not merely the first half.

To be excruciatingly explicit: Bugs (and confusing UI/UX) experienced and reported by rude users also affect many non-rude users. If one wants one’s software to be the best it can be, then one should listen to all bug reports; the attitude of the reporting users are irrelevant.

What if he doesn’t care about the “best it can be” because his product is already so widely used? What if he thinks “my product might be a little worse, but I’ll feel a little better”.

I agree that he’d be under an ethical obligation to listen to a rude security report. But it doesn’t follow that he must therefore listen to all rude bug reports.

As a user of some software, I would certainly hope that the developers would prioritize fixing bugs over their own egos.

As a user of free software you can hope all you want, but you have no right to an expectation that this is the priority. Your right end with the decision to stop using the software, which is exactly what Don said to the original email

Well if the developer does choose to prioritise their ego, you can always get a refund.

maybe when we are all replaced by robots that is true, but its not possible for the average person to take abuse constantly and keep a level head. That's not how our brains are wired