At least microplastics don't make you angry and violent that we can tell.

On the other hand, it's going to be around (relative to pre-emission levels) for a lot longer than the lead (paint gets chipped off and disposed of, we stopped using it in end-consumer products, etc)

There's some concern that microplastics in the brain could contribute to depression, anxiety, executive function disorders, autism, Alzheimer's etc.

As the amount of plastics in the brain increases who knows what it'll do to us.