Almost every time he's on screen I end up laughing my ass off. His exchanges with Jaime were epic. His expression when dropping onto Yara's ship was excellent. His demeanor when fighting the Snake and Yara was great. You don't have to like him but I think he's great
I forgot to mention even the little facial expressions he makes look like he's just having a blast. When he stepped toward Cersei in their first meeting and the Mountain turned towards him, that look he gave made me "oh shit I think I like this guy now". And then the look he give the Mountain before leaning in to Jaime made me realize he's testing them! And I was like "Holy shit this guy is funny as hell!"
Agreed, but man I had a blast watching Euron everytime he was on-screen. Simple one-dimensional fun villain.
As for the fight, Grey Worm beats the unholy crap out of him: fought in that hallway with Ser Barristan against the Sons of the Harpy, fought out of the fighting pit with Daario and Jorah against the Sons of the Harpy, and took down the Lannister forces at Harrenhall.
These feats outweigh Euron's wins over Yara and the the Sand Snakes, who were THE worst characters in the show's history and won every fight they participated in due to plot convenience until Euron's plot convenience trumped theirs. They had no business being a match for Bronn.