Jax Taylor accused his estranged wife, Brittany Cartwright, of trying to “sabotage” his brand deals and career opportunities in a new scathing rant.

The “Valley” alum took to Instagram Wednesday to share, and then delete, a screenshot of a message Cartwright allegedly sent to Divergent Lifestyle Co., a brand created to support dads with kids with autism, after he shared a flyer promoting a forthcoming event.

In the message, Cartwright allegedly wrote, “Hi, my ex-husband posted this event. I was wondering if you are sponsoring him or if he is officially involved in this event. If so, I’d like to share some information with you.”

Cartwright, 37…

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