First stage is to divide seated areas into persistent standing and persistent seating. My elderly father has only been to two premier league away games he stopped because in both of those people stood in front of him, he didn’t see anything and all of his vain requests for them to sit down were met with ignorant, rude replies.
Now, I like to stand up all game too so I can see both sides but the resolution to this is so easy.
One simple solution would be for you to buy a ticket behind your Dad not in front of him : )