No.
> Basic proper usage of <h1>, <h2>, and <article> tags are nowhere to be found
If you think semantic HTML is somehow more common back in 'ye old days' when frontend frameworks didn't exist, I have a bridge to sell you.
> You have to teach React developers the difference between the <Link> and <a> tag, and how <a> doesn't swap nor replace your page content, it loads an entirely new page.
I suppose this is true, as poor engineers would not understand the difference in abstraction. Is it any different than someone accepting unescaped input in their SQL? Yes, the latter is a lot more destructive.
For such a scathing indictment (destroyed the web) I'd have expected there to be more meat on the article, but the two points above (and SEO/og tags) are the only thing it actually talks about.
It's a silly 'lets put down frontend development, because I want to sell you my WP agency services' post. Frontend is a clown-fiesta you could have at least actually gave it more of a put down, but the criticisms are so transparently thin its somehow less meaty than the site's nonexistent portfolio.