Ephraim is oppressed and broken in judgment, because he willingly walked after the commandment. Walked after the commandment - Jeroboam's commandment to worship his calves at Dan and Beth-el. Many of them were not forced to do this, they did it willingly.
Related Commentaries of Hosea 5:11
Hosea 5:11
11 Ephraim is oppressed and broken in judgment, because he willingly walked after the commandment.