I usually don't respond to these types of threads because opinions are so vastly different about the topic and PASSIONATE. But, what the heck...here goes.
First, I'm a big fan of the late 60's - 70's rock music. I love YES, Kansas, Floyd, The Eagles, Queen and so on. I don't really care for much pop that happened after Van Halen (not that big a fan of VH either).
Second, whether a group is terrible or not is in the "ears" of the beholder...I suppose.
Third, I'm actually encouraged by some of today's pop...singer-song-writer stuff coming out. It's not really my cup of tea but I hear more going on in their music than some would give credit to. Just because you don't like it doesn't mean it's "terrible." Although, I agree, I probably wouldn't listen to much of it.
Here are a few names that I actually do like. You'll notice there is no "real" rock in the list because there just isn't any real well done rock IMHO:
So, strictly pop -
Ed Sheeran (I just find his writing interesting)
Adele (killer voice, great lyrics)
Maroon 5 (I like some of the hip interplay between parts)
Pink (got a killer guitar player I like to listen to)