Southwest having a different pricing strategy does not make it misrepresentation.
Edit to respond to fragmede below:
If a customer selects 0 or 1 checked bags, would it be better for the customer if Google flights did not show Southwest as an option at all?
In response to "you can see how THIS is a misrepresentation, right?" they said "actually, I've never had that problem, so..."
At some point, you have to recognize who and what you are dealing with and cut bait. But, hey, YMMV! Godspeed, if you're willing, I suppose!
If I go to Delta to buy the ticket, but cannot actually purchase the ticket for the price quoted (which was the problem), then there has been a misrepresentation of the actual cost of a Delta ticket.
Compounding that, if the actual price I pay for a Delta ticket is more than the comparison price for a Southwest ticket that would have allowed me to get the same fare, then the comparison is a misrepresentation. The comparison is no longer apples to apples. That's not a problem with Southwest having an issue with pricing model, that's a problem with the comparison sites not being forced to show comparisons between like products. That comparison, between unlike products, is a misrepresentation, if a reasonable person could believe that they were looking at a comparison of like products.
I'm not going to belabor the point further; the law was changed for exactly this type of nonsense. It's a misrepresentation.
The price I see on Google flights has always been the price I pay on Delta.com
If I pick 2 checked bags on Google flights, then Google flights shows me the price for 2 checked bags with Delta.