And that alone is already a pretty scandalous problem. If the law is not stated in a way that ordinary people can understand, how the hell are they supposed to obey it? Those who cannot afford the highly paid law explainers are basically locked out of society.
The truth is that the constitution is interpreted by humans in a common law context, and enforced by the apparatus of state, which has the means to impose its will. Calling this doublespeak is weird.
The Constitution is written in plain English. And for the most part, Supreme Court decisions are written in plain English that any reasonably literate US citizen can understand. Yes, the law has technicalities and terms of art just like any other profession.
But one of the most damaging mentalities in modern times is the idea that the common man is incapable of understanding the law at even a basic level. This is flat-out not the case. Which leads to the follow-on problem: people who think lawyers have the ability to cast magic mumbo-jumbo spells that "get their clients off on a technicality" somehow. The best quote I ever heard about that from an attorney was "any time someone says a person 'got off on a technicality,' you can pretty much just safely replace that in your head with 'had their constitutional rights egregiously violated.'"
Yes, there are problems. Qualified immunity is a problem. Prosecutorial misconduct can be a problem. Abuse of discretion at the border is a problem. But that's different from doomerism about the entire justice system to the degree Very Online people express it.