No.

A cult is a group of people centered around a central leader who controls literally every aspect of the followers’ lives in minute detail. If someone belongs to a religion and feels free to, for example, go find a different pastor/teacher/priest to follow, this alone would make it not a cult. If said person can leave the religion without dire personal consequences, it is not a cult. If said person is free to spend money on things unrelated to the religion, it is not a cult.

If it helps, you could say religion is to government as cults are to fascism.

I get that you are an atheist and think religion is stupid. But please understand there are important distinctions to make. And if you think religion is bad, you need to know cults are worse.