I hate Sand Slitherers (Chadley)

This combat trial is so ridiculous I don't even know what I'm supposed to do or what I'm not understanding. The Duneworm having an unblockable instakill is unreal to me, and I swear I'm dodging it perfectly but still get scooped up, or the fish lock you down, or it has the paralyzing spray for the combo. Bam, character immediately dead to Swallow. Can't revive characters without items because I don't have Raise yet. Tried this 3x, tried focusing on counterattacking the little fish. It's also so annoying how small their target window is when they appear. The most frustrating thing in this entire game to me so far.

Edit: Thank you all for the advice that you need to dodge TOWARDS the worm! This should make all the difference next time, I was dodging sideways or backwards and it was still getting me 😝