When kids are growing up, the whole world is a big blot of confusion for them. And adjusting to new things can be pretty challenging. Especially with an introduction to a new parent, their tender age might cause trouble with such a massive change in their lives.
So, it was but natural for Minimum_Succotash526 to not immediately accept his new dad and things escalated when the stepfather repeatedly insisted that he wanted to adopt the teen poster and even brought up his late dad. Well, it didn’t go down well with the guy.
More info: Reddit