UFC legend Matt Hughes is adamant he NEVER physically abused his wife and nephew -- and claims they're all making up false allegations to drive him out of their lives.
Long story short ... Hughes says he's "not the same person" since his accident -- when a train slammed into his truck in 2017, resulting in a serious brain injury.
"Since my train accident in June of 2017, my life has been changed forever. Some days have been absolute hell," Hughes says.
"The challenges and battles that I have faced have been far greater than anything I ever took on in a cage .