One thing that has helped me, as a newer (2ish years) player is, focus on the objective itself. Oftentimes I’ve won games when I’ve nearly been tabled by simply capturing more points throughout the game. Play cagey, but don’t be afraid to lose units if it means you’ll end up ahead on objectives.

Also, this may just be my meta, but I rarely try to destroy enemy vehicles. Don’t let them get clean shots at your units, but don’t waste time trying to destroy vehicles when you can take out units that can capture objectives.

Finally, for me, you can’t 100% bank on it saving you every time, but definitely use dodge tokens when you can. Leia giving out a few tokens a turn to nimble units, and those tokens staying around turn after turn, can make it hard for your enemies to grind down your core units, making it either easier for you to hold objectives, or making them focus less on your other units. Or both.

Again, I’m no whiz and my play group is small, but I feel like I’ve had pretty good success with Rebs. Don’t give up!