Were you using the 'original' ketchup or a less sugar, lower sodium variant?
Heinz is making a MASSIVE change to ketchup - and it could be good for you
Are you on a new medication?
Personally, I prefer Trader Joe's organic ketchup. Try it sometime.
Having grown up in New Mexico and eaten both red and green chile nearly daily I love spicy food. When my east coast relatives have visited me there most all of them could not handle even the mildest chile dishes. They did not seem to enjoy the flavor either. I guess it is all what one is used to eating.
New Mexico chile - Wikipedia
I never really adjusted to eating most east coast and midwest food which I find far too bland and tasteless. Maryland steamed crab is an exception as are some spicy Italian sauces which I dearly love.