A stealth missile would cost more than the tank it was being used to kill. Also, a radar-stealthy missile still cannot solve the problem that it would be *highly* visible on IR - you can see a B2 flying through the air at night on IR if you get close enough from the heated leading edges of the wings. Nosecone of the missile, to say nothing of the RED HOT GLOWING ROCKET MOTOR would kind of tend to give that away.
Jamming has certain possibilities, sure. But in, say, urban warfare, jamming isn’t going to be terribly effective and you can’t generally get good artillery or close air support. Something about the buildings getting in the way.
Ok, there is no counter, the perfect weapon system
History says you are wrong