Unfair nerfing of Engineers and vehicle kills

explain to me how I am so far down the leaderboard every game…I have a large amount of conquest flags taken over 40 kills and around 20 deaths! I have at least 6-8 vehicle kills and a dozen assists and Im all the way down the leaderboard. This is unacceptable nerfing of the engineer class and or me. Its not fair. I put in numerous hours and paid good money to be completely disregarded in my role and my abilities/impact. The issue is clear. You are unfairly only  giving points to K/D and flags! I can drop 7 choppers in a game with unguided missiles and get 8th place?! Nonsense! Im an EA member since 2007 and Dice is abusing my role, myself and treating me unfairly.