Snap interview questions

I applied for a Market Research role at Snap Inc towards the beginning of June 2019 and was contacted about a week later by someone in HR looking to schedule a phone interview. I provided my availability and we confirmed a date/time for later in the week (Thu @ 5pm EST). Fast forward to 5pm on Thursday and no one calls me. I didn't think this was unusual since HR professionals' days are filled with phone screens that often run over the allotted time. I wait a few more minutes and still no call. At this point it's 5:20pm and I've yet to hear from the HR rep at Snap. I decide to email him to make sure everything was ok and if we're still scheduled to speak. No reply. The next day comes around and I wait until the afternoon before reaching out again. I figured maybe he was out of the office or an emergency came up and that's why he couldn't make the call. Still no answer. Finally late afternoon on that Friday I get an email saying how he was busy at a conference and had to rearrange his schedule last minute. He mentioned the possibility of connecting later that day or the following week. This was at 6:46pm EST. I ended up ignoring the email and chalking it up as a missed opportunity. Certainly as a candidate I wouldn't be afforded the same benefit of the doubt if I failed to show up for an interview. This interaction felt unprofessional and reflects poorly on the company. He never reached out again thereby confirming my belief that he wasn't all that serious in the first place. Do not take prospective employees for granted and waste their time.