If you believe that then you're ripe for the rule of man which is tyranny - what we have now.
No, "constitutional" is the rule of law of the Constitution itself AS WRITTEN and ORIGINALLY understood and intended which is essentially what we had for the first 125 years before the ungodly lurch to the Left in the 20th Century spiritually and politically.
I can work with either definition of "constitutional," and prefer to not argue over what the label means. My point is that the victor claims his actions are constitutional. As you point out, the "rule of man" that the PTB impose these days is labeled "constitutional" by the courts and the government. The official word (for what that is worth) is that homosexual marriage, affirmative action, deprivation of rights by entry on a secret list, unfettered snooping, etc. are "constitutional."
SCOTUS has Alice in Wonderland powers, and it is eager to use them.
I don't personally grant them legitimacy, but if push comes to shove, they'd kill me and laugh about it.