It seems you do not play RTS games – ignoring the fact that those are exactly like modern warfare /s – you would know that certain systems are incredibly effective against certain other systems. Like StA missiles against Russian fighter jets and helicopters which is why you do not see them in the air much at all, and certainly not to a militarily significant degree. Perhaps you are suggesting that the Russian defenses are so powerful that Ukraine will die trying to take those hills? For every weapon, there’s a counter. The Russians have mined huge areas of the occupied lands and it is indeed slow going. Slow, but continuous for the Ukrainians. It’s sad that you see this war with real tragedy and absolute senselessness as a game.
The F-16s will need parts, logistics, and weapons, the pilots and ground crews will need extensive training… those jets will do nothing this year. Perhaps next year though. I agree that Ukraine is fighting with one arm tied due to NATO fears of nuclear retaliation. Is that a reasonable fear? I think so. Putin is not a sane or reasonable person. And Ukraine has shown the capability to hit Russian targets within Russian territory. If the Ukrainians were allowed to hit harder, deeper, more sensitive targets in Russia, the war would escalate – Russia would not want to be seen as beaten by its little neighbor. A shame, agree or disagree, but right now, those are the rules of war that Ukraine must abide by for continued support from NATO.