I gave up sugar because of my poor tooth health. My taste preference also quickly changed. It's surprising how many American products have ridiculous amounts of sugar added to them, how difficult it is to find unadulterated products, and how little sweetener foods actually require to have their flavor perfectly enhanced.
The sweetest I can tolerate is the 1/4 tsp of raw honey I add to my oatmeal. There are very few restaurants I can eat at any more and most processed foods taste and smell horrible.
If you truly mean tolerate, then your sensitivity might be a bit in the extreme. I wouldn't expect anyone to be bothered by eating a bit of pure sugar or honey even if they prefer their food unsweetened.
But yes, a lot of food is excessively oversweetened (it's a cheap way to win kids and therefore long-term habits), and you become desensitized to anything you constantly taste and will notice differences when you stop.
However, everyone has different taste, both genetically and because of whatever else they eat and is more or less sensitive to, so there's no such thing as "flavor perfectly enhanced", only your own particular preference for a particular dish. Someone eating less sour or being genetically predisposed to bitter might violently disagree with your flavoring for example.
The sweetest I can tolerate is the 1/4 tsp of raw honey I add to my oatmeal. There are very few restaurants I can eat at any more and most processed foods taste and smell horrible.