First, you are in a 3-man alliance. That severely limits the pool from which your opponents can be drawn. I also believe there is a time limit on when you can face the same opponent again, further limiting the pool.
Second, I am in an alliance with a huge variance in member levels and benches (from around 20 to close to 80). I am far from the strongest bench, we have some members with Telluria, Gm, Finley, etc. My war tank is Costumed Elena (used to be Marjana). My raid tank is Justice. I am regularly top scorer for my alliance and usually in the top 3. We have lost wars where I was 6 for 6. And we have won wars where I was 0 for 6. We also regularly face single element tanks.
I am not sure what you are trying to prove but since my experience in the game is apparently so vastly different from yours you aren’t proving anything to me.
BTW this war I one-shot the opponent’s strongest team with my second string green squad against a Telly tank. Four 4*, probably 1000TP difference. Telly even fired and I had no healer. Good board.