[2022] is there a easy way to get millions of lions at lough rank?

If you're strictly F2P, the way you're going to earn lions is paying attention to repair costs, playing conservatively, and paying attention to what the vehicle SL multipliers are.

IF your playstyle is rushing and playing whatever (ie, not paying attention to repair costs) or using more expensive ammunition and not ensuring that your shots are connecting... you will lose money.