Oh, but I'm not.
I know exactly what you're talking about. In fact, I had the same exact problem in a few games years ago.
I realized that they don' want you holding on to all of that crap and moved on with my life.
Seriously.
Pick one craft. Stop hoarding materials for the others. When you get a bunch, use them. Go get more.
This game isn't designed to handle a "crafter only" player type.
This game is making you pick and choose what to keep in your bags. You want to keep everything. Therefore, it's your problem, not theirs.
I had 0 problems keeping up with my crafting materials when I only did blacksmithing.