Help! My system is very bright it hurts my ear

Don't worry. Most Systems are bright and hurt... But most like that. Especially when it was expensive to reach that level.

Asking why a system is too bright is like asking a mechanic why a car won't start.  There are so many possible reasons that it would take a book to list and explain them all. 

I would suggest, starting with treating 
your ac.
Get some good audio grade outlets
I use Maestro (these are under $100.00
and outperform those twice their price).
Synergistic XOT's attached at your 
speaker terminals, do a good job in 
curbing brightness.
A good power conditioner, one without 
a transformer in my opinion should do
the trick. 
Grounding your component, where buy
on placing your ear to you speakers, 
it is black, like if your system is turned off.
The proof of what I am saying is just 
listen to your system in the mid afternoon or evening, and then listen
at midnight.
You will notice a greater clarity in the
music and a much beter base response
without making any changes.

Well I hope this helps.

Best regards and happy listening,

Xavier






evening, then listen to it at midnight.

Interesting read for sure.  I would have the same issue with various brands of speakers.  Try going to your local shop and sampling the music on their system to see if you have the same issue.  Of course, many suggestions provided make good sense as well.

Change the fuses.