From 1984 "If you want a picture of the future, imagine a boot stamping on a human face — forever."
How can things change, then? An invasion is not better than a revolution. Economic pressures work for most countries today (not e.g. North Korea) but not for oil countries -- note that most problem states do live on resource exports (see resource curse).
The only two ways I can see his regime could be defeated are:
* Turmoil within his ranks leading destabilizing his power structure
* Significant economic downturn (e.g. oil price falls or oil trading is hindered by sanctions)
One could argue that the growing discontent with Putin among the younger generation could lead to his demise, but I don't think it would work. They can protest all they want but as long as 90% of the population are successfully hypno-toaded, Putin can deal with the protesters in any way he wants.
You on the other hand seem to be blindly throwing around assumptions (you can't logically deduce "supports X" from "doesn't make a point of denouncing X") instead of taking the more mature opportunity of delving into the points mentioned.