I don’t think it was designed with the type of group playing in mind. There’s not that much of a difference if everyone in the pug is competent and experienced with the pug meta routes (which, admittedly, is rare). Premades can still be a disaster.
If you pug enough, you will eventually learn. But I think it’s faster in groups where you know everybody and y’all care about each other, then your progress becomes their progress and vice versa.