!!!!ATTENTION SPOILER ALERT!!!!
Okay, I saw season 2 and some clips on YouTube and in the comment section I saw a lot of people who said something like: "I hate Victors Mom, she should be more supportive." And yes, Victors Mom could have react better, but it's not that easy. She has a extremely catholic background and was raised with a different culture mindset. When you learned that homosexuality is not normal or unnatural and a sin, then it isn't so easy. I won't say that the reaction was okay, but it was realistic and something what happens to so many queer people around the world everyday.
Yeah his mom could have react like his dad, but that isn't realistic and in some scenes you can see that his dad also needed a moment to realize that nothing is different, that his son is his son, no matter what. Queer people thought about their sexuality and their identity their whole life and when they come out they expect a supportive reaction, but if you tell people, who thought that you are hetero and cis and you tell them what you are really, think about that they need time. You had your whole lifetime to figure out what you are and you family and friends may love you unconditionally but give them time to realize what you tell them when you come out.
That's the reason why I think that the reaction of Victors Mom is a good medium to show how different people react and how annoying it is when parents react bad. Maybe some parents who can't imagine that their child could be queer see this and realize that they don't want to react like Victors Mom.