I've only seen a few episodes of the first season and a few of the 2nd, but I feel exactly the same way.
Yeah. And there was some stuff the first season about a relationship with her and Gabriel, but there hasn’t been any discussion of that.
Taylor didn't like her at all (I think he wanted her job) and then Flynn didn't like her either and worked with Taylor to try to sabatoge her. Up until the point an old case came back to haunt them, Flynn had mis identified a body ( I think) and Taylor went into CYA mode, Flynn had made the original mistake and Taylor was ready to throw him under the bus. Brenda grilled Flynn and then backed him. Which left Taylor with no allies.
Actually, Taylor didn’t want her job, he was mad because she was a higher rank that he was. There was some LAPD rule that a newcomer comes in as an officer or a deputy chief, and Taylor’s a commander. He was pissed that she outranked him.