The days of this airline being a musicians friend are over!!!

I used to always be able to find a open bin to put my guitar on the plane. But now that we have assigned seats the bin that I’m assigned to are always full. This sucks so bad for me. I have a very expensive tool that I use to make my living that can’t be tossed around or put in the belly of the airplane. I used to be able to just tuck myself in the back of the plane and not bother anyone. Now everyone hates me for taking “there” bin space. I’m so mad about this plus being an A lister has basically no more value to it. Any suggestions for other airlines to be loyal to? Southwest obviously doesn’t care about me so I don’t see why I should care about them anymore.