I just can't stand spending time with the family.
Why don't you want to spend time with your family?
In what way can I participate in family activities when everyone does the exactly same thing all the time. It's boring to follow others in a routine.
While I can understand it might be boring sometimes, I think it is important that you spend time with your family, and it is rude to avoid that. You should show them your affection by hanging out with them, otherwise they might start to drift away from you and you will end up being alone.
What's the point of doing the same things everyday? It's better to be alone and have freedom.
It is not about the activities. It is about spending time with the important people in your life. Be there for them and spend time with them while you can.