“arrogant.” The NET text note has a good explanation. It notes that the Hebrew word “is likely derived from ) מָנוֹןmanon(, meaning ‘disdain’ )see L. C. Allen, Ezekiel ]WBC[, 1:52(. A derivative from this root is used in Prov 29:21 of a rebellious servant. See HALOT 600 s.v. מָנוֹן.” The word “arrogant” fits the context and the attitude of the people of Jerusalem.
“even acted according to the ordinances of the nations.” The pagan nations were more godly than Judah and Jerusalem!