No. It is unsubstantiated because you have provided no substantiation. To anybody that is not you "their recent track record" is not a meaningful statement without some context or citation.

> It matches my experience exactly.

That does not provide any amount of substantiation to your claim. Not only is it an anecdotal claim, you're not even relaying the anecdotes themselves!

Also just dropping in to make a blanket (and OT) claim that the WaPo is putting out clickbait "lately" reeks of ulterior motives. If you actually had a substantiative claim about how this particular story is misleading or erroneous that would be another thing.