Abbreviations, as a class, cannot possibly be judged as inherently "good" or "bad".
Individual abbreviations evolve into existence and disappear into obscurity all the time. You can say that the "good" ones live on, while the "bad" ones wither away. That's "survival of the fittest" at work.
Some abbreviations are so widely used that they eventually become words in their own right. Some examples are: laser, PC, e-mail.
Don't like the modern examples? Here are some more with a longer history. What we used to call "motion pictures", now we call "movies". Motor cars become cars. Omnibuses become buses.
Want older ones still? How about P.S., etc., e.g., i.e...
So abbreviations are all around us. Just exercise your common sense and use them when you expect most of your intended audience will understand them.