Every deviation that came out of the Reformation movement, and that includes the Restoration movement is considered Protestant, by the words of the Reformers.
Not true in the slightest.
No anti-Trinitarian is a Christian, let alone a Protestant, and is most especially not a reformed Christian.
Every reformed creed and doctrine upholds and declares the Scriptural truth of the Trinity.
But I do recognize the impulse of most RCs to label every non-RC as a Protestant, and therefore as "defective," according to the current bishop of Rome.
It's either that, or face up to the contradictions to Scripture within your theology.