Matt Barnes is ringing in the New Year in a very special way ... BY DESTROYING THOSE WHO CROSSED HIM IN 2015 ... Rihanna, and Derek Fisher.

In an Instagram post that'd make 50 Cent proud ... Barnes calls out a pop star who "lied on him" saying he's got texts -- and pics --  to prove their relationship was real.

You might remember ... Barnes told TMZ Sports he and Rihanna were hanging out -- and could be a thing -- only to have her viciously and publicly shoot down his claims on social media.

Barnes went even harder on Fisher ... calling him an "snake" who banged his ex Gloria Govan on the sneak tip ... then snitched to the NBA and police when he "got dealt with."

We wonder how the league might feel about the Fisher stuff ... being that they slapped Barnes with a 2 game suspension for allegedly attacking the Knicks coach last summer.

BTW Barnes had one more message for EVERYONE ... HAPPY NEW YEAR!!!

Thank God For 2016! 2015 hands down was the worst year of my life! * *Lost the women I loved,the mother of my kids, my Dogg.. I had to walk away from the only thing I've wanted, MY OWN FAMILY! "They call that karma" *To being traded away from a team & city I love! "They call that the business" *Lied on by a pop star Who's lucky I stuck to the script & didn't expose her lien ass Funny thing about texts & pics is they DONT LIE! "I Guess" "They call that getting played" *Last BUT NOT LEAST... Being stuck in the "triangle offense" w my ex & snitch, I mean former teammate & friend.. Who went behind my back, messed w my ex, got caught, got dealt w for being a snake, then ran & told the Police & NBA.. Instead of taken that ass whoopin like a man & kept it moving....! WHERE THEY DO THAT AT? Guess cause I didn't SNITCH, I get a 2 game suspension by the league "They call that LIFE" WHEN IT RAINED, IT POURED in 15 All this played out like a bad reality show, a nightmare, for your amusement & entertainment! For you to critique, make fun of, crack jokes & laugh about.. "What I shoulda did" or what "y'all would have done" Hmmmm... I say all this not for sympathy, because I had a hand in all the bad $h!t that happened.. I was never perfect in my relationship, I didn't see eye to eye w my head coach.. I was warned SEVERAL times about ole girl & I introduced love ones to people who I "thought were FRIENDS"... Lesson Learned!! This is for all of you who had a F@#%ed up year... To let you know I'm right there w you, We In this together! Everyone has ups & downs in this game called LIFE... It gets better.... "I think" Hahaa nah it does, trust me! --- -Remember God gives his toughest battles to his strongest soldiers!!! -Stay positive, hold ya head, tighten your circle & stick to your instincts.. -It's not about how many times you fall down, it's about how many times you get up! Heres to freeing your hands of all the bullshit of 2015 & preparing for the blessing God has in store for us all in 2016!  HAPPY NEW YEAR, LOVE #THEBADGUY

A photo posted by matt_barnes9 (@matt_barnes9) on Dec 31, 2015 at 7:42pm PST