To be fair, farming bots is very important to prolong your attack phase but I know what you mean. In a good team you would have support to increase your survivability on your bombing run but that actually requires decent team play. So overall it seems to me that your problem is less the scoring and more really frustrating experiences of so called team play (or not). Do you have a clan? My experience was that the fun increased 10 fold once I was playing in an organised team. When I see a bomber doing a run I usually tail them and try to make them survive as long as possible which usually ends up with me dying and the bomber surviving which is mission accomplished in my books.
If you are looking for a clan, our clan, Angels of Death (AOD), is currently recruiting and is a great place also for the most casual of players but there are obviously many other clans. look for one which suits your gaming habbits:
https://answers.ea.com/t5/General-Discussion/The-Angels-of-Death-Fleet-is-recruiting/m-p/9561709#M3816
Apologies for blatantly highjacking the thread for some recruitment but it felt to me that this more a complaint about lack of team play rather than scoring.