The interviewer:

• Interrupted every few seconds, so I wasn't able to finish a single sentence.
• Interrupted my "back of the envelope calculations."
• Interrupted and had difficulty understanding everything related to regions, AZs, DRs, etc.
• Believed that everything must be synchronous to avoid data loss.
• Believed that performance is only about the minimum number of requests.
• Believed that UUIDs are ordered and interrupted me multiple times when I tried to explain distributed ID generation, stating that he "knows the answer."
• Interrupted any attempts to draw high-level designs before going into details.
• Was not familiar with very basic terminology, like DLQ, stating, "You didn't state that a queue will be used."
• On the note "we will use structures similar to lists in Redis," interrupted and said I'm going to use Redis.

I'm a bit confused with this experience.

Design Twitter's architecture in full scale.