Saying “maybe people are the problem” is reductive and unhelpful. But I agree with you broadly, religion is just a system or a tool, it can be used for good or evil.
To judge if religion is a good system or a bad one, we can use a cost benefit analysis. This is what we have been attempting to do in this thread.
But when it comes to sensitive subjects like religion, many people have a tendency to avoid, overlook, and deny the associated costs.