Zach Bryan has had it with the haters since his split from Brianna “Chickenfry” LaPaglia.

He let loose on his Instagram Stories on Thursday, firing back at his critics and calling out the “f***ing weird couch warriors” targeting his friends -- even going as far as to say their behavior was so bizarre, they should be “studied for science.”

Zach called out the ridiculous rumors of him juggling 4 different girlfriends in 2 weeks, setting the record straight that he’s single and staying that way. He said it’s all about his friends right now ... who, according to Zach, are being harassed and receiving death threats online.

That was just the beginning, “Go give your time and attention to the literal city burning down and stop being so sad and fickle and childish through the screens. Last thing I’ll say on his. Insane I even have to. You do not know me. You never will know me. Stop acting like you do,” he wrote.

Zach says the haters’ actions are so vile that it’s making him question everything even though he loves making good music for fans, he’s over being in the public eye.

Last October, Zach announced that he and the Barstool Sports podcaster had split after more than a year of dating.

In the aftermath, Brianna aired their dirty laundry all over social media and her podcast, accusing Zach of infidelity and emotional abuse. But Zach? He stayed silent -- until now.