It’s not a fact, because it depends upon a subjective interpretation of the word “working.” Some might argue, for example, that if the President can cow Congress into subservience, then the three branches of government are no longer in balance with each other, and thus the constitution is no longer “working” as intended.

Depends on how he cows them into subservience. If he uses the threat of electoral defeat for opposing him, that's totally legitimate. If he uses his position as commander in chief to threaten them with force, that's different.

It can be true that the constitution is not working as intended, AND the US is a far cry from a country like Russian in terms of it operating as a constitutional republic / democracy. It is not subjective to say the US is more of a democratic country than Russia.