I'll be the first to admit, This game can be very frustrating at times and does have a steep learning curve in the beginning. Especially for F2P like myself.
I started the last week of November, maybe 27 days ago. After promoting my JC I've used 72 energy every day on trying for Dooku shards and am only at 36. I've wasted massive amounts of credits and training droids experimenting with new toons and trying to level everybody evenly to work though GW (even leveled Ewok Scout to 30 out of desperation before I stopped). I made the mistake of getting, gearing, leveling, and promoting Asoka instead of Fives or Boba thinking she could replace Talia as a viable healer. She still hardly ever heals. Used GW crystals and cantina battle energy to promote Biggs for a while instead of additional promotion for Lum and JC or Chewy. Like everybody else, I was stuck on Light Side 5J for a LONG time! It's been rough.
But it's still a blast of a game and I play every night! When I first posted on this board, Dec 5th, I was ranked mid 900's in PVP. I've been slowly advancing the last 18 days. Today I finally ranked 198 at end of day. I'm making it to the 12th fight in GW almost consistanly and I'm sure I'm only a few days away from beating it. Sid is 5* and JC is gear level 7 and both are DPS monsters. Lum is on her way to 5*. I just unlocked Opress and am looking forward to leveling and promoting him to replace Talia or Chewy.
Yeah it sucks bad when you burn though 100+ energy and only get 1 shard or piece of wanted gear. But it adds to the excitement and sence of progress when you do land the extremely rare four Dooku shards in six battles or bump a rank level in in PVP. When you have an epiphany and change your stratagy and suddenly Dooku and Bariss are no longer impassible walls to your progress.
No single toon seems OP to me now. It's only team combos and and strategies that make a difference. This game is like any other. If you like it, you play, make mistakes, learn from them and learn from others and you will have fun. If you don't like it or are looking for a free ride. Maybe it's not the game for you.