Financial Samurai strikes me as sadistic. His post about Mr. Money Mustache's divorce is pretty horrible example of soulless SEO headings kicking a rival blogger when down https://www.financialsamurai.com/mmm-divorce/
I found the post you linked to overly verbose as these bloggers often are. They make lists and sections and go on tangents on what could be a 300-500 word essay. I think he could have excluded the backstory and just focused on how important it is that your partner be onboard the FIRE/extreme frugality lifestyle. So I think it’s poorly written and not an enjoyable article. However, it’s a pretty damn important message and difficult to talk about until someone prominent that is serving as a poster child for the FIRE niche like MMM goes through it publicly.
He's kicking someone else when they are down, but that seems to be petty revenge in retribution for perceived attacks.