You play by taking over land, and I don't blame you. It's your choice, your strategy! Likewise, you need to treat without judgment if someone is taking revenge on you. There is no need to impose your worldview on people. You have good defense, it took me 100+ moves to buy the required number of planes for 1 retal. And then I would have to sell them, since this is an extra burden of the economy and extra expenses. Therefore, I decided not to engage in peaceful development, but to devote this kit to revenge. LOL.
P. S.
You write that you took the land from ten players ... Bravo! Don't you think that in a short time, you will lose the advantage that you got at the start, seizing the ground? And you will have to return what you captured with interest ... What the end of this set will be known only to the almighty Ares)))