16 teams sounds like it would be a pain. I'm guessing your waiver wire is empty.
I'd like to know what your opponents are working with. It doesn't look terrible for a 16-team league; my only problem with it is that you seem to lack that one "it" guy. Even with that many teams, you should have at least one big name from round 1 of your draft. I'm guessing that was AP? He's just not quite the same as he used to be.
You've only lost 2 in a row. It's not time to panic yet. I'm not fantastic at Fantasy, but I do a lot of research deciding who to start each week. The bigger your league, the more important it is that you do your homework and make sure you're starting the lineup with the best potential every week. You should make sure you know exactly what the projections are for each player based on their opponents, performance, etc. You should be able to work through things if you're diligent and make good decisions. Don't just stick what you think are "your guys" in there at starter every week and leave your bench to rot.
See if you can package a few players together for a solid upgrade anywhere on your roster. With 15 other teams, at least one of them must be weak, depleted, or desperate enough to bite on a slightly lopsided trade. I'd probably work on upgrading SJax or one of your receivers.