I have a 14 supercrew that I bought new and have always had condensation under the truck when it runs along the exhaust system. I can buy that the muffler might have holes in it but don’t buy where it leak up under the driver side right at the “y” pipe junction. See the video link below, am I crazy or right? Thanks

 

That's a slip fit connection and a low spot. Any water in the system will collect there until it gets blown further down the pipe or dries.

 

Water will always find a way out, you won't have an exhaust leak but the water will still find a way through the slip joint. On a side note better to leak out than to stay the pipe and start corroding.