To get a bit miffed when I have spent ages cooking a lovely meal

[Marioandluigi]

and then my DH drowns it in Tomato Ketchup

He even did it last night when I made Carbonara.

I'd be cross too, Marioandluigi. We have ketchup with some meals but not with others, and even when we do have ketchup, I don't want people to drown the food in it.

I am sounding just like my mum!

Not in the slightest. My dh has brown sauce and for extra special 'jazzing up', chilli's. DD has been giving him the evil eye and told him that not everything needs ''jazzing up'.
Jazzing up = his words formaking it more interesting/spicey

You certainly have a right to be miffed so you're NBU! I'd be furious! I get cross when MIL puts salt and pepper liberally all over the food I've prepared without even tasting it first. Especially when I normally check seasoning before it gets to the table. We normally put the salt and pepper on the table for manners, but now I 'forget' to put it out!

YANBU - my ex used to do this with almost every meal, particularly pasta . Very irritating!

YABU. If you cook something FOR someone, it is entirely up to them how they choose to eat it. It's not about you.