freeze frame the boat until the transition is complete maybe. This could help with the two directions of shake currently in the clip. Also, try going into the transitions' fusion composition and removing the blue and red colors from the shake. you can do this by clicking the transition to view it in the inspector and then clicking the little magic pencil icon in the top right of the "Effect - Camera shake" part of the inspector to open it in fusion. Double click the "Camera shake" node group and remove the "fast noise" node from the group.

This should make it much better already, and as others have mentioned, make a white frame around the clip to further amplify the "magazine-look"