I don't think the overall quality of phones has worsened, in fact, I think across the board, things are as good/reliable as they've ever been. I look at it as a problem of perception and popularity. It wasn't all that long ago that mobile tech were toys... fun little distractions that didn't warrant a lot of attention. Now, these phones have become woven into the fabric of our lives and any significant development in the industry makes world headlines.
So everything is magnified.... and problems get all the attention.... No one cares if some dude had no issues getting an Uber to JFK, but if on the way, the battery in his phone pops and burns a hole in his jeans, it makes CNN.