"I am intrigued though, that neither side has made calls to repeal the Fixed Term Parliament Act"

Boris Johnson doesn't want an election. It was suggested after the first vote that he could table something that only required a simple majority, but he didn't, you cant really argue it's people against parliament, when you are (hopefully) a majority of parliament.

Those against a hard Brexit don't want an election now because it impairs their ability to do that, plus its been nicely illustrated to them why you don't want too much power to reside with the executive.