Keep in mind that I'm 33 years old, so it'll likely be inherently more difficult to get an interview, but let me offer my 2 cents:
I've been at this game since I was 22 years old coming out of college...that's right, going into year eleven of this game in some form or fashion. I've applied to all of the following:
2009 - 2010: Air Force Active Duty (2x; non-select, then board cancellation)
2010 - 2013: 13 different ANG/AFRC units (12x non-select; 1 interview, 1 selection by a KC-135 unit...had to eventually relinquish my slot due to some tough family stuff that would have certainly interfered with successful UPT completion and more)
2013 - June 2020: Get the personal life situation in order, while everyday thinking about applying as soon as things were. And they are now.
June 2020 - Present: 6 applications submitted (2 outright rejections due to age, 3 I've never heard back from, 1 that still has the chance to interview)
I'm old, but have decent numbers: 96 Pilot, 87 PCSM (97 with 201+ hours), ~60 flight hours (post-solo) and on-track to finish my PPL this Fall, assuming CA wildfire issues don't keep grounding my flights.
At my age, I've come to learn to learn two things:
1. Patience isn't just a virtue, it's the ardent protector of sanity.
While life is indeed short and years certainly do go by fast, unless you're already in age waiver territory chances are you've got several years to make this happen. I know we'd all like to be picked up on Application #1, but man, patience is key. We're all pursuing a career that is as cool and as fulfilling as it gets, and part of that career is the process: Enjoy it! Don't let impatient steal the happiness that's found in all of this! I know it seems like, if after 13 applications it hasn't happened that it may never happen, but I promise you: keep at it, improve in someway every month, quarter, etc., and simply don't stop pushing. It will work out. Be patient, and let the math (i.e. # of apps submitted over time) work in your favor. Eventually, even after years of applying, there's gonna be a unit that's gonna be like, "Ya know, this is the 3rd year in a row this guy has applied, he's visited several times, and wow, he's now got his PPL, instrument rating, and his PCSM just hit 99. Let's get him in here to interview."
2. Be yourself. ALWAYS.
And when you get that interview, come more prepared to this interview than you have anything else in your life, and be yourself. Take it from someone who's done it: pretending to be anybody else but yourself is incredibly difficult, a cancer to the soul, and I have no doubt squadrons can see it coming from around the corner. My granddad used to say, "I can tell by the way that joker walks what he had for breakfast," and I'm sure these hiring boards are no different. I highly doubt you'll secure a pilot slot simply saying everything the board wants to hear, and if you do, you're likely to be eventually be weeded out, one way or another. So be yourself--and always strive to be your best self, but that's a different topic--and take comfort in knowing that, whether or not it worked out, it did or didn't based on you being you. There's solace to take in that, I promise.
Eventually, it will work out. And in the off-chance it doesn't, and, somehow, it's become official that being an ANG or AFRC pilot wasn't in the cards for you, you'll be able to look yourself in the mirror knowing you didn't sucker out, and you'll likely have some awesome civilian flying and ratings to sustain your love of aviation as you move into the next phase of life.
Best of luck to all, and as many others have said, don't stop improving, and don't stop applying!