As for NFZ, there's AIM-120 ground launchers that could achieve the same result, but you have to be careful not to shoot your own aircraft. Not cheap compared to Javelin, Stinger and NLAW, but good for high altitude targets if that's the problem.
As long as the Ukrainians keep getting supplied with sufficient missiles, counter-battery and drones, Vlad will be digging himself into an ever deeper hole. At what point, if ever, will the missiles run Vlad out of armor and artillery?
In the optimistic scenario that Vlad is forced to stop feeding armor and artillery to the missiles, domestically he will face the news of massive personnel losses that will inevitably trickle through.
Germany exited WWI after the Kaiser abdicated. We can hope for a similar outcome, but another Versailles is best avoided.