As a USAFA graduate I can tell you that without improving your grades you're probably not going to get into any service academy, much less get a pilot slot. Once inside, it's comparatively easy to get a pilot slot if you are PQ, or Pilot Qualified (about half of my class got them; disqualifying reasons include eyes and sitting height), but you have to keep studying in order to pass classes and get to graduate, as passing classes is perhaps the easiest way of getting kicked out. You might try ROTC or OTS, but again, you have to study, and slots are fewer and farther between for those. Besides, even if you do get a slot, you'll have to study your arse off to get fighters. IFS (initial flight screening in Pueblo, CO) is a cold hard one, since you need to study a lot. After that, UPT (more studying), and then track selection (more studying), and then plane selection (get the picture?). And you need to be in the top of your class to make it to fighters (if you get the chance, some UPT classes don't get fighter/bomber slots, and some fighter/bomber tracks don't get any fighter slots). It's not impossible, and it's definitely worth it (at least the part I can speak about, which amounts to the Academy and stories heard on bars and other unlit places here and there), but it does take a lot. Plus after making it, your studying ain't over. Fighter pilots need to study tactics and aircraft/weapon capabilities and limitations for their own aircraft plus anything else in the sky they might face. Bottom line, if you really want it, you have to work hard to get it, but you'll probably enjoy every minute of your life up there.
Oh, and that stuff about being a tame service? while I was reading I thought of a whole bunch of names who wouldn't agree, from Pilots to Crew Chiefs and Pararescue Jumpers (ballsiest bunch I know), to Logistics to Security Forces people who've made the greatest sacrifice and became heroes all over the world (including 10 from my country today, which is why I'm a bit negative and for which I apologize)
Good luck if you try, and if you have any more questions on the steps do let us know.