This hobby isn't known for much common sense, but the best advice I read years ago when you've become unhappy with your system is to:
Take a sabbatical. Don't listen to your system for at least a month or more. Listen to bad PA systems, bad car systems, friend's bad systems, "normal" people's junk, bad systems...
Remember how bad they all sounded.
Turn on your system, let it warm up, sit back, relax.
It might surprise you how good it sounds!
Tom

