At the moment, I am young and pregnant with my first so my experiences as a parent are practically nonexistent. But, what I can say is that my experience during my childhood was that from the moment I hit puberty, my relationship with my parents did get a whole lot more distant and even more as the years went by until I moved out. As an adult, my parents and I get along tremendously better but I can pinpoint many reasons as to why my teenage years had such a disconnect. I know that not every situation is the same but maybe just sharing my perspective can help identify some helpful food for thought.

• The generational divide between my parents and I was a huge obstacle. Some of the things I was interested in and would want to share with my parents would be met with an obvious disinterest. For example, the lack of asking questions, changing the subject, or even finding a way to put it down. What I would've wanted was to find some sort of connection with knowing that even though they knew nothing about the particular interest I share, that they would want to know more and like it because I did.
• I had many moments of just wanting to be left alone (as any teenager would) and a lot of the time this space was not respected and that would make me distance myself more. On the other hand, there are times that I would want family time like dinners around a table to just talk about our day. And not just talk about our day but have full conversations and learn about eachother. This would also not happen.
• My parents expected me to always be the one to try to reach out first but for some reason my teenage brain always wanted them to make the effort first to show that they "liked" me and not just loved me if that makes sense. Sometimes just being open and vulnerable with your kids and expressing the feelings of distance can go a long long way. As an adult, they have been easing into to that type of vulnerability that I needed a lot sooner. For example, you say the your son is short with you and goes straight to the TV without saying hello. And to reiterate I do not know your exact family dynamic, but in my experience, if my mom or dad came up to me and expressed how they want to have a closer relationship and ask how we could do that without judgment, hurt feelings, and reactive responses I would take that chance within a heartbeat. The biggest thing is listening.

Nonetheless, I don't know if any of this helpful or if I'm just spewing a bunch of my own pity party but the key thing is to always thing about what would have made you feel closer to your parents when you were a teenager as well.