The phrase "dictatorial to" is grammatically correct and can be used in written English.
It is often used to describe someone or something that acts in a authoritarian or oppressive manner towards others. Example: The leader's behavior was dictatorial to his subordinates, often punishing them harshly for minor mistakes.
Sounds dictatorial to me.
For his part, Mr. Booker uses adjectives like "fascistic" and "dictatorial" to describe his opponent.
There is a difference, though, between being a manager who wants power and rule and one who is unreasonable and dictatorial to the point that it alienates everyone.
In places like Myanmar, Somalia or Iran, too poor or too dictatorial to attract independent commercial media companies, providing solid news may be the best that the West can do.
Misadvised by a frustrated and panic-stricken attorney general, a president of the United States has just assumed what amounts to dictatorial power to jail or execute aliens.
It now seems clear that Erdoğan, who is sixty-three, intonds to arrogate dictatorial powers to himself, have them ratified by a subservient political order, and stay in power for years to come.
Likewise, in 22 BC there was a food shortage in Rome, which sparked panic, while many urban plebs called for Augustus to take on dictatorial powers to personally oversee the crisis.
"We want the whole faculty to change from a dictatorial age to an age of freedom," said Ali abdul-Jabar, a petroleum engineering student and senior member of the new Shiite student union.
We only have to study democratic versus dictatorial governments to learn that we thrive in environments of tolerance and fairness and suffer in their absence.
In 1973, the two top law-enforcement officials in the land — the Attorney General, Elliot Richardson, and his deputy, William Ruckelshaus, refused to carry out Nixon's dictatorial order to terminate Cox.
And if I were a Republican, I'd probably feel the same way about an endless stream of emails asking for money to stop Obama from exercising dictatorial powers, to sue him, or possibly impeach him.
