Ok, she's not bad looking but she is not super hot or sexy.
There are much more attractive women in the office that Ted ignores.
Plus it's not like they're actually a potential good couple or have anything in common. Anytime they're in close proximity, they argue relentlessly. Ted couldn't even bear sharing his office with her
I get what you're trying to say, and I don't necessarily disagree. However, given the context of the show and its characters, Linda was very attractive. Sure she is pretty and compared to every day media may not be someone to lust after, but in the context of the show is still very pretty as well as sexually alluring, so I'll give her a pass. :)
"No talking from things that don't talk!" - Jaye Tyler