If you don’t like hearing people you disagree with talk about those things, you should be going to do something else rather than rudely trying to make them shut up. Even from the perspective that you just want to challenge this user about the appropriateness of how they are expressing their opinions and frustrations,

I have nothing against anyone who wants to bring up issues, but the way one brings up the issues should be taken into account. Anyone who tries to get their point across by spamming GitHub issues automatically loses points in my book.

Is this acceptable in your book? Are you defending this action? It certainly is not acceptable in mine, and the reason why I called the user out on it.

I understand if you take offense at the way I came across the user in question, but when they repeatedly bring up their pain as a response, it is only logical that I ask them to refrain from actions that cause them pain. It's one thing to have to go through pain for basic life-sustaining tasks, like eating, drinking, or even physiotherapy, but if your brain hurts typing on a social media forum, which you repeatedly refuse to cease, then you have no sympathy from me. Lemmy, or even Reddit for that matter is not a basic living requirement.

you are going too far and behaving inappropriately yourself with all the personal attacks.

What personal attacks?

Just leave it alone and if they are saying things that you feel need to be addressed just report and move on.

Likewise, if you have an issue with what I said, go ahead, report and move on. If I broke any instance rules, I'm sure the responsible admins will be swift in delivering the appropriate response.