He's a jackass. See post 129.
And the worst STOS episode was The Empath, with Mark of Gideon a close runner up, neither of which is mentioned.
Of course that's because the author was covering all five series'. As we know, there was a lot of crap in season 3 of TOS.
The Empath was truly cringeworthy - especially to a teenaged boy who had grown accustomed to nubile space sluts ;’}
Looking over that list a lot of them are surprisingly good, considering the plug was already pulled on the series mid-season.