Yup it’s dumb fun. That’s it. That’s why it’s my guilty pleasure. I’m in no way a better person for having watched it and it has the depth of a shallow puddle, but I get several giggles when I watch. One thing I’d disagree with you though is Rose McIver isn’t a bad actress (she did a solid turn in iZombie and other shows) and she can charming but the character of Sam is under written I’d agree.
“You could never just do the expected, I was just an idea in a bog, But you sewed up your dream and we made quite a team, Jim and Kermit, a boy and his frog.”
https://youtube.com/watch?v=t9kT1xIpZ4E