Ok, looking over your roster, you really just need some focus. You have a couple of team bases (Rebels, Sith) that could probably move you up in Arena and help you get through GW, but they're not developed. Rather than starting over with yet another faction, maybe build on what you have so you can get your income sorted out.
If you want to salvage this, I think your Rebel team can bring you up (and can get you Palp someday). Leia, Biggs, STHan, JC, and K-2SO or Boba can get you along if you develop them better. In the meantime, farm Wedge from Cantina. Another option would be Vader, Sidious, Dooku, KRU, and JC. (Until you get a self-healing mechanism, a healer can help.) Use both of these squads in GW, mix and match as needed, and use the restart button liberally.
It looks like you're having a credit crunch problem. You've got a lot of toons unlocked, but only a couple are leveled up. Getting a squad of 5 toons to your max level is going to make a big difference for you. It will put your potency/tenacity on par with what you're facing in GW and arena, and well as increasing the stats of your toons overall. Scoundrels let you complete credit heists. You want to complete the highest-level heist available to you. If you can't do that, you need to focus on getting your scoundrels geared and modded.
Be very focused in your gear and credits. Don't unlock, star, or level toons unless you're going to use them immediately. Don't add gear on them just because you have it. A little discipline goes a long way.
Finally, are you in a guild that's helping you grow? At your level, you'll benefit a lot from Heroic Pit raids 3 times a week and AAT at least once a week. If your guild can't do that, find one that can.
