I just don’t think it’s very likely for just about any leader putting themselves into the position you are describing. This is a reoccurring narrative in western media, and I’m not here to defend dictators, but i feel like reality is less black and white than that.
Many of the "crazed leaders" we are told are acting irrational, often do not. It’s just a very, very different perspective, often bad ones, but regardless.
Let me try to explain what I mean: during the Iraq war, Saddam Hussein was painted as this sort of crazed leader, irrationally deciding to invade Kuwait. But that’s not the entire truth. Hussein may have been an evil man, but the way the borders of Iraq were re-drawn, Iraq was completely cut off from any sources of fresh water. As expected, their neighbors cut off their already wonky water supplies and famine followed. One can still think it’s not justified to invade Kuwait over this, but there’s a clear gain to be had from this "irrational" act. Again, not a statement of personal opinion, just that there IS something to be had. I’m not trying to say that i am certain that Hussein had the prosperity of his people at heart, but i do think that it isn’t entirely irrational to acknowledge that every country in human history is 3 missed meals away from revolution. That’s not good, even if you are their benevolent god and dictator for lifetime(tm).
Russia "irrationally" invading the Ukraine may seem that way to us, but let’s see. Russias economy is just about entirely dependent on their petrochem industry. Without, their are broke. The reason why they still can compete in this market is their asset of soviet infrastructure and industry. A good majority of USSR pipelines run through the Ukraine. I’m not saying it’s okay for them to invade, but i can see what they seek to gain and why exactly they fear NATO expansion all that much.
I personally don’t see a similar gain to be had from China invading Taiwan, at least right now. They have lots to lose and little to gain. Taiwans semiconductor industry is useless without western IP, lithography equipment and customers. There are even emergency plans to destroy taiwans fabs in case of invasion. And that’s beside the damage done to mainland China itself.
But as i stated, this may very well change when they get more desperate. Hussein fully knew the consequences of screwing with the wests oil supply, but the desperation was too acute.
I just don’t buy irrationality, there’s always something to be had or something to lose. It may be entirely different from our view, but there’s gotta be something.