And as previously stated: FTB is not perfect. They are still developing this product (which I would like to remind you is entirely free for you to use). They JUST released their official launcher 5 days ago. They have stated it is not complete yet.
So, either, you can stop using it until it is entirely completed (since you have so many problems with it in its current state) or you can go ahead and make your own launcher and mod pack with absolutely non of the issues you have found with Feed The Beast. I for one, am entirely grateful that someone else did all of the hard work for me, and those same people are still working toward making my gaming experience better. Ok, so there's a third option for you, be thankful and patient like the rest of us.