Tired of people dissing other people

Its not just me, but I feel that a lot of dissing is going on around campus, and I guess thats what happens when you get a big group of girls together and emotions run high with tests and everyone gets stressed. But there comes a point when people just need to learn to keep their mouths shut. I admit I occasionally say things that shouldnt be said but I do feel bad about them and I have a hugely guilty conscious. I feel, though, that many of my practices are being dissed, examples include I didnt study for hours last night for a test that is happening tomorrow, so I must not know the information as well, or I am for some reason a worse student because of this- that just doesnt cut it, I have different study habits than everyone else, I have to study during the day, and the morning is the best time for me to study, by the time evening rolls around I am exhausted mentally and I just need a break. Another example that happened was that friends said that they were discussing a professor's teaching habits and how bad they were and would I like to join, my response? "No, thanks, I actually understand and enjoy the way that particular professor tries to convey information." I dont understand why people put down other people just to make themselves feel better, its not needed, maybe understanding your own strengths and weaknesses would be a better way to know when you are doing well. I mean I know that I am not a straight A student in college, but I am doing better this semester than I did last year. And I know that my test grades in my CMB class arent great, but I am not about to kill myself trying to get a 100%. I have been studying all week for the class and there just comes a point when I need to chill out and let my brain absorb everything before I put more in it to digest! Anyway, I need to submit my Accounting homework and then start feeding my brain again, I will vent again soon!