Gurbaskh Chahal says RadiumOne's board of directors voted to fire him after he told them he wouldn't resign.
The 31-year-old pleaded guilty earlier this month to charges of battery and domestic-violence battery, both misdemeanors, in the August 2013 beating of his girlfriend.
Police say he beat his girlfriend after he found out she had gone on a trip with another man. He was sentenced to three years' probation, and avoided jail time.
Chahal said Monday that he blames social media for becoming "the court of public opinion" in his case. He said he agreed to plead guilty as part of a plea deal at the guidance of the RadiumOne board.
A spokeswoman for RadiumOne did not immediately return a call seeking comment.
Bill Lonergan, who has been COO at RadiumOne, was named the new CEO.
(The Associated Press contributed to this report)