Chicken Maker: Unpleasant Lenses
There are Rose Tinted Lenses. That's when everything is perceived as bette than it is/was. This is a common analogy. Another analogy, which is actually a bit of a play on words, is Jade Tinted Glasses. This is because being Jaded is when you see everything worse than it is.
Things are awful with a hint of great. I was planning to do some nonsense analogy when my net came back but this wasn't it.