I agree the Leopard is a great tank.
But I wouldn’t want to be in one on the modern battlefield.
There easily 1/2 dozen first rate ATGMs in circulation that can kill ANY tank. Some are fire and forget. New models defeat active armor.
Just ask Russia. They’ll tell you.
I'd rather be in a tank, than a APC, truck or out in the open as a soldier. As for the Russians, if you stupidly just send tanks, without APC's and infantry support, yes they can/will be destroyed.