I think it's more the control that SCOTUS has demonstrated, and that we seem to have no real way to fix it besides impeaching/adding more justices. I'd love to see them impeach Clarence Thomas (especially after the bit about going after contraception and same-sex marriage in his opinion on the Roe travesty), and Kavanaugh, Gorsuch, and ACB all lied during their job interviews, but that'll likely end like Trump's impeachments did when not enough Reps broke ranks to get a conviction. And I'm not in favor of expanding the court based on the number of Circuit Courts, unless you want to change the way the justices are chosen and have them be representative of their court districts (not a bad idea, but no way they go for that...lol).
I also think the filibuster serves a purpose, and Manchin isn't entirely wrong. As much as the thought depresses me, come 2024 if Biden hasn't been able to fix things things by then we'll be looking at a regime change. If the Dems lose control the only thing standing between us and total tyranny might be the filibuster, and since our government usually ping-pongs between the parties (over the years) it's bound to eventually happen. Lord knows it's been used against the Dems often enough.
Look, I'm kind of a centrist (politically). I think both parties (at their core) have solid values and bring important perspectives to any negotiation. I think our government works best when bipartisan actually happens. This polarization of our parties is just stupid, and it will destroy us if we let it. And it's getting worse, though the J6th Committee using lifelong Republicans testifying under oath to tell their story is meaningful, and may plant seeds that will encourage at least listening to the other party and maybe even being more open-minded to what they propose.
I'm so naive...