Why is it everywhere you look, Meyer lemon is the main variety available? Meyer is the nastiest worst excuse for a lemon there is.
Ha ha, I agree with you.
But blind taste tests have indicated the majority of people prefer the taste of Meyer, perhaps because it is more mild and less acidic.
Meyer lemons also tend to have more cold hardiness and tend to be inclined to be more bountiful with fruit production.
They have a bad after taste & just don't compare to a "real" lemon.
If they have a bad aftertaste it's probably because you are leaving them on the tree too long. That seems to be a problem with Meyer, if the fruits are left on the tree too long they very often develop an unpleasant taste.
That being said, even if picked at the right time they still don't compare to a real lemon, in my opinion.