@fourminutestosavetheworld
I'm a teacher so am obviously very sympathetic op.
But IME the teachers complaining loudest about the workload are either very unlucky with their choice of school, very weak at managing their time or have no experience doing other jobs.
We are our own worst enemy. No wonder our genuine grievances are dismissed by many when there are complaints like this.
"Sorry, wasn't very clear. I meant rushing off at 4.30 to get my kids meaning I need to do extra work at home."
There aren't many jobs where you are allowed to rush off at 4:30 because you want to pick up your kids, and it's perfectly fine to finish your work later at home. In most jobs you'd be there until 6 and picking your kids up at 6:30 or whenever.
Like most jobs, there are long days and busy periods of the year, offset by other advantages
Excellent, balanced post. As you say, the teachers complaining constantly, either work for a absolutely rubbish school with little or no management. Or the teachers themselves, just have very poor time-management and don't know how to organise their own workload.
The list of things the OP claims she has to do in the school she works at is farcical. Anyone would think she is the only staff member in her school! 
@forinborin
I am not saying teachers or academics don't work hard - of course, they do. Only that this dramatic exaggeration does not help anyone. So, @0None0 is supposedly in school 13 hours a day, and then adds three hours every day at home, plus full-time hours on the weekend.
I don't know a single teacher who has that kind of workload, if I am honest - I don't even know a single career-crazy corporate type who puts in those hours. Because it is unsustainable if it goes on for more than a couple of weeks.
100% this. Never in my life have I ever known a teacher who works/has worked this many hours per week, (and who does it constantly.) And like you, I don't know anyone else who does this many hours constantly either. Even though some people on mumsnet will claim otherwise. 
As has been said by a few posters, exaggerating wildly about your hours and workload doesn't help when teachers have GENUINE grievances and complaints.