Sabotaging the FBI's background check is absolutely without comparison. It was corrupt and inexcusable.
While yes, all presidents will tend to appoint justices they agree with, you cannot in good faith say that there is any comparison between Jackson and Sotomayor on the one hand, and Kavanaugh and Barrett on the other, in terms of qualifications to sit on the bench. And that's just at the Supreme Court level - the whole affair in Florida with Aileen Cannon is another level of obscene.
The "official acts" decision is completely without legal historical merit, and was made up out of whole cloth to allow Trump's appointees to protect him from any consequences from the judicial branch (remember that whole idea of three co-equal branches of government?). No other president has dared make so bold a claim, both because the idea that the Court should be subservient to the president is clearly at odds with how the American government has worked for almost its entire history, and because they didn't have personal crimes to cover up.
I do have a vendetta against Trump, but you have the cause and effect backwards. I don't think he's a bad president because I hate him, I hate him because I think he's a bad president who is dangerous to me personally, to the United States as an institution, and to the continuation of the human race. But perhaps even more than that, I hate him because he has enabled and legitimized pathetically transparent bad-faith arguments like this.