What the article covers and what I agree with is that people should think very carefully before buying such a dog from a breeder, as breeders are engaged in breeding dogs for extreme looks that are very likely to experience considerable health problems. By buying such a dog you are incentivising the breeder to create more, with scant regard to the health of the animals.
So I'll repeat - nobody is saying you're evil for adopting a rescue pug, quite the opposite, you did a great thing! The advocacy is to stop buying them from breeders until the health issues have been addressed - probably by introducing greater genetic diversity and ceasing to select for extreme brachcephaly.
Can I ask why you feel the need to reduce everything to extremes? Why do you feel the only ethical options are "Put all the pugs to sleep" and "Yay pugs!" ?
Is it impossible for you to see a middle road - the individual dogs are to be cherished, but for ethical reasons we should change breeding practices and maybe discontinue some breeds?