Not that there’s anything I’m seeing wrong in the pic, but since you’re asking…

Never walk away while cooking them. They’ll burn REAL quick.

Try heating a little bit of oil in the pan, before plopping in each quesadilla. The tortillas get a nice crispy fried texture. I can take it or leave it, but my wife insists on them that way.

I tend to cover the pan while cooking, to make sure there’s enough heat to get everything inside thoroughly melted.

Let them cool, ideally on a wire rack, for a minute or two before cutting, otherwise you can squish all the innards out.