From the AG website: These are nonnegotiable tenets of faith that all Assemblies of God churches adhere to. This list is derived from the official Statement of Fundamental Truths.
Certainly there are congregations who don't live up to that, just as there are errant congregations in just about every denomination.
But I believe you err in painting the entire denomination with a broad brush, much the way the author of this article errs in his interpretation of evangelicalism.
Your mileage may vary.
The AG's 16 Fundamental Truths are, for the most part, basic Christian doctrine that could apply to any denomination.