I’ve had a similar experience with other alternatives like Soy curls, which I got to taste good a couple times but strangely could never replicate, and ended up just tasting like adding cereal to me. And Beyond beef, which has an off flavor from the pea protein base.

Quorn seemed to have no off flavor to me or my family, it seemed totally neutral, and they couldn’t tell the difference in tacos, chili, stuffed peppers, etc. I was surprised it wasn’t more popular based on how long its been around.

Maybe there’s a genetic component that’s influencing our flavor perception of it? like how saccharine can taste terrible to people due to genetic differences, limiting its use in soda or candy.