Gavin is introduced as the insufferable character no one wants to see: the single guy with no kids who thinks having kids is easy. He shows up and immediately starts violating workplace discrimination laws which Rachel's boss backs him for doing and is then presented as a hero for eventually showing basic decency. To make matters worse he might be a possible love interest. Overall it's just cringy watching someone bully a vulnerable new parent and then that parent has to grovel and thank the person who tried to take advantage of them for not following through on their threats.