The “label” in question, from the article:

Yelp said it currently applies the following label to crisis pregnancy center listings: “This is a Crisis Pregnancy Center. Crisis Pregnancy Centers do not offer abortions or referrals to abortion providers.”

Paxton is mad that their preachy religious bullshit centers masquerading as abortion clinics are being called out for what they are.

But more importantly, this isn’t about winning. It’s about election-time performance art. Paxton wants to show voters he’s still totally against abortion and please re-elect him.