I loved working in EMS. absolutely loved it. I loved having a good partner, where we had fun, where we could walk into a chaotic scene and make things better. I came in at 6am to 7am, and left 12 hours later. I started working per diem for an urban EMS agency, and enjoyed what I did.
However, I won't lie, there were several draw backs. The BLS standard education level was a high school diploma, and it showed. the ALS standard education level was sometimes an associates, and sometimes not always that high. My agency was incredibly clique, and being in the clique didn't always correlate to being competent. The rumor mill was worse than high school, so when I took a full time position at the agency, it was substantially less enjoyable. Embracing the suck was real; what was worse is the clique people loved spreading misery, however few were willing to work on making things better. It became a vortex of suck, where people would drag it down, and club you into submission. And if you weren't in the clique, the rumor mill could affect your ability to transfer, your promotion potential, and your overall career.
You said many people hate EMS.... but you will note, they are still in it. How many hate EMS so much that they are willing to leave? or work to educate themselves so they can get out of EMS? If I hated something, I would do whatever I could to do something else. Not just complain about my job for 20 years. Do they really hate EMS, or are they trying to sound cool because all the cool kids say it sucks, so they should too?
the reasons
@justin1232 gives are 100% accurate. Few people last more than 5 years in this field (I think that is the current rate). The smart ones get educated past the street paramedic level, either taking the clinical route (RN/PA/MD), or take the management route (BS, MBA/MPA, PhD), and hope that one day they can get into a position that utilizes their education.
I wouldn't trade my years on the ambulance or in the 911 center for anything. But I also haven't stepped foot on an ambulance in almost 4 years now (and I can't say that I miss it), and traded in my cot for a truck with hose and a classroom where I can teach others. Better pay, better hours, more empowerment, more potential, and my fire station has beds to sleep in at night.