Respectfully, you dont know what youre talking about. As much as it sucks, his party has the most seats in the newly formed government, and so he is the prime candidate for a PM. The president has to oficially name him, and after a bit of a controversy about a conflict of interests (look up Andrej Babiš on wikipedia), he did exactly that. This is exactly the process of forming a government coalition in the Czech Republic, only a slightly worse right wing populist won this time.