... it seems the navy is more selective right now than ever, and I was curious about how these negative factors might stack up.
Common misperception. The guys on this site are the guys operating Navy and commercial nuclear power plants; they are not the guys who would select you for entrance into the Navy. While some people here may have done a tour doing that once upon a time, recruiting goals and selectivity change with the phases of the moon.
Bottom line: Most people on this site have no idea what your chances would be. Anyone who does won't comment based on 4 lines of information. The only thing we can offer you is whether or not you are eligible for the program, which you can find out yourself via search and speaking to a recruiter.
PS: You only need waivers for things that would make you ineligible for the program. It is a request to waive a certain requirement. Minor traffic tickets aren't in that category; DUI's, vehicular manslaughter, suspended licenses, etc. are. If you're writing essays explaining why you were doing 40mph in a 30mph zone, you're wasting your time -- the Navy doesn't care. Bad grades are also in that category wrt nuke, but considering that college isn't required to enlist, it's strange that you'd require waivers for your performance in those classes. However, you should have some 'splainin to do, since you're applying for an academically rigorous program with sub-par recent academic performance.
If you have any questions about something or something sounds off, ask him to show you the instruction/requirement. You'll be doing that a lot as a nuke, so consider it your first step of training.
PPS: Your short description screams of someone who went to college, didn't have his head in the game, and is now looking toward the military for financial bail out. If that is the case, you are looking at a very miserable six years, if you can even make it through the program. Regardless if this is the case,
you should finish college before you enlist. By the time you get out of the Navy, you will have forgotten most of what you learned and may have to start all over, costing you a lot more money in the long run.