So much for a lovey-dovey Father’s Day.

Brandon Lee, the son of Motley Crue drummer Tommy Lee, tore his father to shreds on Sunday. Brandon, 21, posted a scathing statement on Instagram after Tommy, 55, honoured his old man on Father’s Day.

“Remember what happened last time you said this s**t? … You gotta show up to be a dad big guy,” Brandon ranted. “If you think we’re so bad, which I can assure you we are not, then you should have raised a man like me. I’m twice the man you’ll ever be.”

RELATED: Tommy Lee Says His Son Brandon Lee ‘Knocked Me Unconcious’

“Once again painting our family in a negative light. Really? Just move on… We all have! You’ve done enough already,” he continued.

Shortly after, Brandon posted a now-deleted uncomfortable video of his dad laid out on the floor unconscious moments after Brandon reportedly knocked him out cold with a punch.

https://www.instagram.com/p/BkJVDaAFt9R/?hl=en&taken-by=brandonthomaslee

Tommy’s own post was only slightly more pleasant, praising his dad while being honest about the challenges of raising children.

“I’m not gonna sit here and post some fluffed up bulls**t for the public to read,” Tommy began. “I’m gonna be honest — Being a father ain’t easy!.. It’s a rollercoaster, okay?”

RELATED: Pamela Anderson Says Son Brandon Is ‘More’ Of An Adult Than Tommy Lee

“My father taught me to respect everyone and everything and to take care of those that I loved,” he said. “He taught me to appreciate my possessions and to be grateful for the things I was given. I’ve f**ked up at times but I’ve always bounced back.”

Touching on his own children Tommy admitted, “When I had a child, my first child, I wanted to instil those same virtues into him. Sometimes I feel like I failed as a father because my kids don’t know the value of things. If they break something, they don’t care because they know they’ll just get a new one, if they hurt someone, they don’t care because so many people tell them it’s OK.”

He went on to partially blame his ex Pamela Anderson for their children’s upbringing and even said, “I love my boys, but they can be a**holes too… and that’s the truth.”

On Monday, Brandon responded in another Instagram post, writing, “Tommy. If you want to bad mouth me, do it to my face.”

https://www.instagram.com/p/BkLCUCrF-cy/

He added that Tommy hadn’t even reached out to him to wish him a happy birthday earlier this month.

“I didn’t hear s*** from you,” he wrote, “and I didn’t go telling the world what a let down you are.”