Kind of stuck in LS/DS/Cantina Battles. Need help

I'm at level 47 and this is my collection https://swgoh.gg/u/westenger/collection/
I have reached these levels with 3 stars, but passed them I always lose a character
5-C Light Side
4-L Dark Side
2-D Cantina
Is it normal that I'm stuck or am I doing something wrong?
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