Earlier quoted context omitted.
No it's really not. "Damning with faint praise" is when, say, you've just effusively praised something else, and then say that the alternative is pretty good. The "least-worst option" means it's not good, but all the alternatives are terrible. That's not damning.
Googling around, the definition that comes up is: > Damning with faint praise is an English idiom for words that effectively condemn by seeming to offer praise which is too moderate or marginal to be considered praise at all. Which seems about right to me. It's like writing an employee a letter of reference, and only saying that they're very punctual - meaning that there's nothing else good about them, other than the…
"Damning with faint praise" is a pretty subtle English idiom. In my experience, it's only used to refer to an instance where someone is socially obligated to offer praise, e.g. a doctoral adviser writing a reference for their student, who gives such faint praise that they intend the recipient to infer that, were they allowed to, they would have been explicitly critical. Since the comment author in question was under no such obligation, I don't think the idiom applies.