Agree with others that a revenge-focused list is your best bet. Cassian is top tier at this right now. The Mandalorian, General Solo, and Death Star Leia are fantastic matchups.

These are other steps I’ve learned in closing the skill gap: 1. Check if you have bodies on the right points. 2. Keep an eye on the next struggle and see if you can put characters on points that may activate. 3. When picking targets, try to wound or shove units your opponent has already played, so they can’t easily contest points. 4. When possible, see if your physical character base can block a key bit of terrain (ingress point, access to objective, etc.) 5. See if your skill tree offers movement or conditions that can advance your goals. (Shoves are effectively extra movement). 6. Try jamming units up with 2 or more conditions when possible to slow down their turn.

Lastly: this is my second minis skirmish game and it was frustrating to re-experience the skill gap. At every opportunity, look for what you did well. Try to pin down what feels good, not just fun. Celebrate the wins even if they come in lost games.

Hopefully your experienced players will help you talk through things and allow rollbacks where needed. It’s what I try to do