What is my insurance companies problem?

3 years ago my insurance was $250, then they bumped it up to $320, said to do defensive driving to lower it, they lower it, for like 3 weeks, find a way to raise it again. Now they raised it again, to $430. For f****** what? I mostly drive to work, my car is from 2007, my record is clean.
What is my insurance companies problem?
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