The Klarna agent has six major issues: verbosity in responses, inability to perform simple actions, asking users to exit support to complete actions, hiding the customer support chat, employing a sickly sweet tone, and suffering from lengthy response times. To address these issues, it's recommended to use a knowledge base for information retrieval, deterministic flows, and LLMs to guide users through actions, ensure clear instructions, provide buttons with common user responses, offer a maximum of three options for each conversation item, include a link that goes to where the user wants to go, host customer support in the bottom corner of the page as a dynamic window, use an agent orchestration platform like Voiceflow, and remove static pleasantries. These fixes can help improve the overall user experience and make the Klarna agent more effective and efficient.