Question: how to decorate a ugly bathroom?
Answer: Option 1: Clean up that grout!
Option 2: Cover that tub with a pretty shower curtain.
Option 1: Cover that floor up entirely.
Option 2: Cover the floor up (mostly) with a pretty rug.
Solution 1: Paint.
Solution 2: Embrace art.
Option 1: Replace the faucet and/or hardware.