Why are my enchiladas soggy?

Did you add raw veggies? If so, they have released liquid during cooking. We need more info on what ingredients you used and how you used them

If you used corn tortillas and not flour, if you fried them first with a brush of oil, if you boiled down your sauce so it is thick you should have sturdier enchiladas

I think you will have better chance at help if you describe your method, but so far I am leaning to thinking that this happens more to me when my corn tortillas are fresh rather than a few days or more old.