ABATTBQ11 said:
Why does reviewing more submissions tank my rating?
There are a few possible things.
The benign one is that you haven't done very many reviews yet, and/or you've done a spurt of them recently. The rating is based on the ratio of Agreements / Reviews, but if you have a lot of Reviews where the outcome isn't set yet, the denominator is inflated, which artificially lowers that ratio. It should come back up as more submissions have outcomes that get you Agreements.
Not as great, you just might be bad at agreeing with other reviewers.
The other is that there's been a bug for a couple of months where some people's ratings are artificially low. Niantic people have acknowledged it in forums, but I haven't seen a timeline or even an explanation.