It doesn't look ignored to me. It explains that the test coverage is currently poor, so they are in a terrible position of not being able to make changes until that is rectified.
The first step is to improve the test coverage. Are you volunteering? AI isn't at a point where it is going to magically do it on its own, so it is going to take a willing human hand. You do certainly appear to be the perfect candidate, both having the technical understanding and the need for it.
There is unlikely anyone on the Go team with more political clout in this particular area than the one who has already reached out to you. You obviously didn't respond to him publicly, but did he reject your offer in private? Or are you just imaging some kind of hypothetical scenario where they are refusing to talk to you, despite evidence to the contrary?
I literally have no idea what you're talking about here.
There are also multiple issues about this on GitHub.
And an open issue that is basically been ignored. golang/go#51071
Like I said. Go won’t fix this because they’ve optimized for throughput at the expense of everything else, which means higher tail latencies. They’d have to give up throughput for lower latency.