I’m not. I grew up in the United Church of Canada and the Anglican Church of Canada, which are for the most part middle-of-the road mainline denominations.
However, I have met some very conservative people in both denominations who adhere to the historic five fundamentals. many of these people have an addiction to being right, to certainty, and blast anyone who admits of ambiguity or problems in the Christian faith. I’ve also met many people in the Anglican Church who were formerly members of conservative denominations and can no longer abide the narrowness of their upbringing, but still see themselves as Christians, and have found a home in Anglicanism.
Mark Alan Schelske in a recent blog explained what he meant by describing himself on Twitter as “a recovering fundamentalist”. You might find it congruent with your experience.