Need help spotting fake review patterns on Amazon!

My girlfriends Amazon product is getting hit with obvious fake 1-star reviews. We're trying to build a solid case to report them, but doing it manually takes forever.

We're looking for patterns like:

New accounts leaving only 1-star reviews

Same wording copied across multiple reviews

Reviews complaining about shipping (when it's Amazon's FBA service)

Sudden bursts of negative reviews at once

Right now we're just taking screenshots and trying to connect the dots, but it's super time-consuming.

Question for OSINT folks: What's the fastest way to collect real proof that these reviews are fake? Are there any tricks or tools to automate finding these patterns without breaking Amazon's rules?

I heard some sellers use automated services to handle this - basically tools that scan and report policy-breaking reviews for you. For someone getting attacked regularly, using a service for dealing with fake Amazon reviews with TraceFuse might save hours of manual work. But I want to understand the manual approach first.

What would be your step-by-step to investigate something like this?