It’s one of those things that when you read about what is involved they make it sound really hard - lots of warnings about carefully adding oil drop by drop or you will ruin it, the recipes all seem to make it sound like a really labour intense effort with a high risk of failure. So a lot of people won’t even get to the point of trying to do it and finding out how easy it actually is.

I think if you are used to bought mayonnaise you are also expecting a different flavour profile, so when you make it what you get tastes “wrong” because it is not what you are expecting.