If you want to improve your ride quality, simply ride in a OBS f250/350, then go back to your truck
Instant improvement
Or, you could look into Sulastic Shackles for the rear, they help alot, just not cheap
https://norcaltruck.com/ford-f-series-sulastic-shackles
Seriously tho, my best friend has a 2014, it rides like a Cadillac vs mine, but probably your shocks are just bad, get a GOOD set of shocks and then if your still not happy try the Sulastics
Usually the rear end feeling like its floating or jouncing when you hit bumps is a symptom of worn out shocks
You can also try hitting a bump in a hard curve, it will feel completely out of control