I completely agree. I see a few people losing hope and frankly, I completely understand. I have applied to 9 schools this year but with the rejections I've already received, I'm expecting to get rejected from the rest.
I know it feels hopeless and the whole admissions process is extremely draining and kind of makes you want to give up, but honestly if political science is your dream, then a few rejections during a cycle (or even two!) shouldn't hold you back. I already know where I need to improve and I'm already preparing to beef up my application for the upcoming cycle next year. If you don't know your weaknesses, I agree with ArtVandalay, go see a trusted advisor and figure out where the flaw is.
If this is your dream, don't give up. Don't let the randomness and specificity of grad admissions get you to give up. But also, life isn't all about a PhD, there are definitely other options and your career is not worth depression and suicidal thoughts. If this is really too overwhelming, take a break for a year. Go work, gain research experience, hell, go traveling and explore the world even. Life's too short to let a stupid generic rejection letter from however-many universities get to you.
And honestly, just try again. I know that's what I'll be doing and if anything, this terrible cycle has proved to me how badly I want this and how much I'm willing to try. I've already applied to 3+ conferences, attempting to get my MSc thesis published somewhere, and signed up to online courses to improve my GRE score.
Good luck to all, and congratulations to all who've been accepted!