Jehu wiped out Baal worship, but what idolatry did he leave in Israel?

Answer: Golden calves at Bethel and Dan

Jehu eradicated Baal from Israel but did not turn from Jeroboam's sins, the worship of the golden calves at Bethel and Dan.

“Thus Jehu eradicated Baal from Israel, but he did not turn away from the sins that Jeroboam son of Nebat had caused Israel to commit—the worship of the golden calves at Bethel and Dan.”— 2 Kings 10:28-29 (BSB)