Express Scripts Intern - Hourly interview questions

First a phone call with a recruiter with basic questions about my background. Then a short follow-up panel interview with several managers. The main reason I rejected the offer was a bad experience with HR. My initial phone interview was rescheduled twice, both times the morning of. Then I got two days notice of the second round interview and they allowed no flexibility. I got the offer a week later via phone call, and the recruiter addressed me by the wrong name and then didn’t confirm the offer response date (after I reached out multiple times) until a day before. They only gave me one week to decide and there was no room for negotiation. One of these occurrences wouldn’t necessarily be a red flag, but combined I thought it reflected poorly on the company.