Too many left policies create unhappiness? You do have a szrange definition of left. Just a hint, the USSR was rightfully called Stalinistic and the Vommunist. Ehile China is a one party totalitarian regime that only recently is curbing down capitalism. None of which are representative of left politics like pro-union, social security, health care and the like.

Left wing policies unchecked lead to communism, totalitarianism.

Plenty of unhappiness can be created from left policies. Mass immigration cause job loss and wage reduction. Increasing taxes creates unhappiness. Spending more today than you have creates unhappiness tomorrow.

Right wing policies lead more often to totalitarianism then left wing ones, historically speaking.

And if you really believe that migration, and not union busting and unchecked capitalism, lead to lower wages, well, I don't think there is anything I can say that might make think about those things more critical.

I would hardly consider Angela Merkel left-wing, but go on I guess. Of course people on the far-left can be power-hungry authoritarians too. Stalin, Malema, and Chavez immediately come to mind. But this phenomenon manifests more often on the right in the west because most of western politics is so scared of any actual far-left sentiment that they nip it in the bud as soon as it pops up. If they had this same attitude towards the right, we would not be in this situation.