Why am I angry?

Today I had a doctor's appointment at 4:50PM, which was for an eye problem.  The ailment is nothing severe, but mostly causes me discomfort and has been a bit frustrating.  When I scheduled the appointment last week I thought it curious that they would schedule so close to the end of the day, but I didn't question it.  On my way to the appointment today I made a wrong turn after leaving from work a little bit late.  After realizing my mistake and correcting it I didn't make it to the appointment until 5:05.  I ran in and was promptly met with the classic response, "the computers are all turned off and we can't take you."  I was so furious.  I asked the lady what the point was of taking appointments at 4:50PM if they can't meet them if someone is late.  Doctors routinely miss appointments with patients, but we accept it as we hold the weak hand.  This is all besides the point.  After I walked out in a huff I called the HyWy and released a fury of words that can't be published on this blog.  I didn't feel better.  I started my drive home.  For 15 minutes I fumed.  I didn't ask the most obvious question until I was halfway home, "why am I angry?"  To be honest I knew as soon as I figured out that I was lost that I wouldn't have been taken.  I could have skipped the appointment and saved myself the frustration.  I went to the appointment, because I still had hope.  I was angry not because they didn't take me, but because they didn't empathize with me.  It would have helped tremendously if they had just said they understood, they would try to see if they could get me checked in, etc.  They could have just gone through the motions, but just the words was what I needed to hear.  In that moment I didn't want to feel like a number or just "that guy".  This is what I think is lacking the medical profession.  The doctors see so many patients that they can't have personal relationships with each and that is understandable.  The staff are so overworked that they don't see the opportunities to make a difference by a small act.  A small act of kindness can go a long way.