My math students consider me a harsh grader. Is my teaching attitude wrong?
Yes, you do seem to have a bad attitude toward it, but I suspect you knew that.  I would suggest trying as hard as you can to put yourself in their shoes:


Not everyone enjoys the same things you do.  What's a subject you had to take in school but didn't enjoy?  Can you imagine not putting as much effort or showing as much respect to it as someone going to grad school for it?
It's totally rational for someone to try to maximize their grades. I think everyone finds it annoying when students push for every last point they can, especially when you don't feel they've earned it.  I like to remind myself that it makes perfect sense to try to get the best grade you can for the least amount of effort.  That doesn't mean you give in to their exhortations, of course, but if you understand where they're coming from then that's not incompatible with both helping them and keeping your sanity.
Everyone is busy.  A lot of undergrads are adjusting to life away from home for the first time, are taking on responsibilities for the first time, and are probably swimming in social and extracurricular activities.  That's what they're supposed to do; just keep in mind your class isn't the only thing on their plate.
The things you find easy, others find hard.  You specifically gave some logarithmic rules as an example.  To you, that's trivial.  You can't understand how it's not trivial to someone else - I mean, you probably even just told them it was trivial!  But I bet you can think of a field where you struggle with things an expert finds trivial.  Foreign languages are a good example for me - I can hear how to say something in a new language repeatedly, and it just goes right out of my head a minute later.


That said, you suggested you "hate" teaching.  If you really do, maybe it's not for you.  On the other hand, you're here asking about it, so maybe you're interested in changing.  To do that, try hard to put yourself in the shoes of your students, and remember that they're just trying to get by.  Some will fail, and that's okay.  But you can help all of them, even those who won't ever get your subject, without resenting them.