Do you Shudder to Shower?

Then shatter the shoddy shanty to shambles and shine up your shins in a new showery showplace!
I guess what I'm trying to say is. let us rip out your old leaky shower and replace it with one you are proud use.

Can't Cope?

That's OK, we can, and do!
Coping is a way of back-cutting moldings to ensure a tight fit at inside corners.
Crown molding first was used  over 2500 years ago by the Greeks and were cut from stone. Today's crown molding most commonly is made from pre-primed woods. There are some synthetic alternatives out there, but be wary as many times they give a wavy look.
A general rule of thumb is that the height of the crown be 1/14th of the wall height . A great way to further add to the look, is to add multiple pieces of trim to create a "built-up" look.
In the second picture, 3 pieces of crown are used, and then the wall between them will be painted to match the trim. This creates an even more substantial feel for these 9' ceilings.