This is peak "whataboutism" and false-equivalences.
All of the problems you've mentioned have some element of truth to them, but are also grossly exaggerated either by the activists working to address them (you have to make the problem sound really bad and really urgent to get attention) or by people just looking to attack the US or a specific politician, party, etc.
I don't think they're exaggerated. They're awful problems, and much reform is needed. However, I don't doubt that it's used to attack particular politicians, but the US isn't a "shining city upon a hill" providing the great example for all other countries to emulate. We have our own significant problems, and so long as we have them our moral grandstanding loses some of it's effect internationally.
All of the problems you've mentioned have some element of truth to them, but are also grossly exaggerated either by the activists working to address them (you have to make the problem sound really bad and really urgent to get attention) or by people just looking to attack the US or a specific politician, party, etc.