Brittany Cartwright was not here for Jax Taylor’s recent social media activity. During The Valley star’s Tuesday, April 9, appearance on the “Not Skinny But Not Fat” podcast, host Amanda Hirsch asked Cartwright, 35, what she thought of her estranged husband, 44, “liking” a comment on Instagram that said he should have married his ex-girlfriend Stassi Schroeder. “What?!” the baffled Vanderpump Rules alum exclaimed when Hirsch told her. “He liked it? That’s very weird. That is so creepy.” The former SUR bartender dated the Next Level Basic author, 35, during the first few seasons of VPR followin…