en_tn/job/23/02.md

Even today my complaint is rebellion

Here "Even today" emphasizes that his friends arguments have not changed Job's situation at all. Alternate translation: "In spite of what you have said, my complaint is rebellion"

my complaint is rebellion

That is, God continues to afflict Job, but Job will not stop claiming that he has done no wrong.

my hand ... heavy because of my groaning

Possible meanings are 1) "I can barely lift my hand because of my groaning" or 2) "God's hand continues to make me suffer in spite of my groaning" where "hand" refers to God's power to punish. (See: rc://en/ta/man/jit/figs-metonymy)