The words "he" and "his" refer to a Babylonian solider who represents all of the Babylonian soldiers. These pronouns can be stated as plural. Alternate translation: "They bring ... they drag ... their fishnets ... they gather ... their dragnet ... they rejoice ... they are glad" (See: [[rc://en/ta/man/translate/figs-synecdoche]])
Here "them" and "men" refer to people in general. This can be stated in first person to include Habakkuk as one of the people. Alternate translation: "all of us ... drags us away ... gathers us" (See: [[rc://en/ta/man/translate/figs-123person]])
Habakkuk speaks of the Chaldeans conquering people easily as if the people were fish that the Chaldeans catch with fishhooks and fishnets. (See: [[rc://en/ta/man/translate/figs-metaphor]])