Sarek is a real piece of work. I think his parenting is his own unique failure, not necessarily an example of how every Vulcan parents. He isn’t the only parent of a human-Vulcan hybrid. Spock says there are others out there like him. If you believe the books, Trip and T’Pol married and had other children too, 100 years or so before.
Sarek is from a high status family. His first betrothed, Sybok’s mother, ended their connection and decided to go off to be a priestess instead. Sarek may or may not have been allowed to have anything to do with his first son, which was probably embarrassing and a blow to his ego.. He then rebelled against Vulcan cultural mores when he married Amanda, a human, had a child and did everything he could to make his human wife act Vulcan and his half human kid a perfect Vulcan. Then he somehow managed to arrange to adopt a fully human child, whom he also twisted up in knots while trying to show he could improve upon her humanity by raising her as a Vulcan. I think he has a thing for humans, is attracted by emotionalism and ashamed that he is, and also has a desire to boost his ego by reforming them and showing the results to the Vulcan Science Academy. His saving grace is that he also loves his wife and children and even gave up a piece of his soul to save Michael.