Judah had some bad kings and some good kings. All of the kings in Israel continued to worship the golden calves, so they were all considered to be bad. Judah and Israel continually fought each other.
At the shrines, the people worshiped Yahweh. But later, during Hezekiah's reign, it was decided that all sacrifices must be made only at the temple. (See: [[rc://en/tw/dict/bible/kt/temple]])