Yeah, I can imagine that's frustrating. Is it something you actually want to take some action on? Do you want to help make HN a better place? Please don't take that as accusatory: it takes effort to be constructive, and each person has to make a decision whether or not that's worth the effort. If it's not (or perhaps at least not right now), it may not worth commenting at all: as you say, your comments have been attracting downvotes regardless.
If you think it is worth the effort, then I'd ask you to take a step back and see if there may be ways you can change how you're commenting: Communication is a many way street, involving all parties involved. The only one you have control over however, is yourself, so really the only thing you can do.
You mention "push[ing] hard against the echo chamber", so it sounds like you are interested in making HN a better place. I definitely think it's important to figure out ways to have constructive conversations about difficult topics. I also think there are ways of going about this that actively work against that. It's really important to keep in mind normal human psychology and behavior.
Unconstructive complaining is very unlikely to move the needle in a positive direction. It adds to the noise and degrades the overall atmosphere. Commenting on the internet is hard: it's low bandwidth compared to many other forms we're used to: we don't have the benefit of intonation or body language. On a diverse forum, we can't rely on a common background in which to place what we're saying. It sometimes feels like there are more ways it can go wrong than to go right.
So extra time and care is important, particularly if you're interested in discussing contentious issues. When things go wrong, it's really important to take a step back and see how you might have contributed to the situation, and, even if you think you didn't do anything wrong, to look at what you can do to actively prevent whatever went wrong in the future.
It's perhaps trite, but I think it often can be summed up in "it's not what you say, it's how you say it", with the corollary that as the topic becomes more contentious, it's even more important to take care in how you say it.
I hope you do choose to look at ways you might change how you comment to have the effect you want, to make HN the place you want it to be. HN is a community and how each member chooses to contribute makes HN what it is. We can each help make it the place we want it to be by how we participate: how we comment, vote, and submit.