TOS Klingons were total shits. But that’s because they were originally based upon the Soviet Union. Many episodes in TOS had the Federation and the Klingons competing over forging alliances with less advanced civilizations, or having little proxy wars, such as the episodes Friday’s Child or Private Little War.
The Klingons and Federation were clearly in their own little “Cold War”.
It wasn’t until Star Trek III that you ever heard a Klingon mention the word “honour”. Then the cultural influence behind the portrayal of Klingons changed to vikings/samurai with TNG which they kept for about 30 years.