..and I am going to add on here. I am actually a tad insulted that someone would imply that if you don't graduate "on time" then there is an issue. I worked (and paid my way) through all of my education and there was no way I could have done it otherwise.
I totally agree. I finished in four years, but only, I acknowledge, because I am blessed enough have my parents to fully support me financially.
Two of my other friends, whose parents have disowned them physically and financially a long time ago haven't had it as easy. They work, manage classes, and support themselves. One takes two classes at a time while she works full time, the other is taking three this semester. They juggle a lot, and I truly admire them. Actual work experience also can significantly make the difference in obtaining a job, much more than the time it took to complete your degree.
And for others, more than 3 classes a semester is too much to handle. To graduate in four years I had to take 6 classes one semester. My grades were a shadow of what they had been in previous semesters, and I felt less personally fulfilled by the experience than I normally do. It wasn't what learning was supposed to be about. Many of my friends in school are taking an extra semester to graduate because they took one less class a semester. It's silly to think that will significantly impact their future.
To the OP: If you really hate school all that much, maybe you should choose an alternate path. Not everyone should go the route of higher education, and maybe you are one of those people. I'm not going to sugarcoat the facts: yes people that only have high school diplomas earn significantly less than a person with a two year college degree. But maybe personal fulfillment can come in the form of getting a job in a field that you really like and already qualified for rather than money.
On the other hand, if you want to continue with the school thing, try to find a subject area that you really enjoy. In my mind, higher education is such a universal privilege (in terms of appeal, not opportunity); everyone can find something to relish if they look hard enough.