Zelensky fires Ukraine ambassador after criticism of president's sarcasm towards UK

Ukrainian President Zelensky dismissed ambassador Vadym Prystaiko after Prystaiko criticized Zelensky's sarcastic response to UK Defense Secretary Ben Wallace.
Wallace had suggested Ukraine show more gratitude for UK military aid; Zelensky responded sarcastically that Ukraine could thank Wallace if given instructions on how.
Prystaiko expressed concern that Zelensky's sarcasm could be exploited by Russia to create rifts between Ukraine and its allies.
The UK has provided significant military aid and training to Ukraine amid Russia's invasion.
Zelensky removed Prystaiko from his role without giving an official reason.