I have never had such dodge problems. However, there are some bad RNG rounds when no one can stick TL. But I have TIE advance and Fives for those rounds, their TL is unavoidable.
Have your all pilots have 5* lv15 mods? That means allot in fight. No matter what mods, just 5* and lv15.
And today I reached my TIE Fighter to 7*. Now his dodge is 33%. Will see how it goes.
I use Biggs/Umbara/TIE advanced/TIE Fighter/Slave-1 :: Backup: Scimitar/Wedge/JC
All pilots max lvl, (84 atm), all 7*, lowest gear 9.
But difference might be my fleet shard vs your fleet shard. If your opponents are gearing and tending after their pilots, then it will be harder. I have only few that are whales and have better gear. I can win them by strategy and exploiting their weaknesses.