Poor thinking. Russia doesn’t have the money or resources to go on forever. Sanctions are taking their toll on the ability to create said weapons. Lastly the only ally he has shipping weapons is currently In enough internal turmoil to make the prospect of continued help difficult. If the US and euro tighten the screws on Iran for both the Human rights and the help it’s giving to russia, then they too will be unable to provide any assistance. They are in a no win situation fast and I don’t think dumb bomb carpeting is still a viable military option.