I think both statements could benefit from citation.
cupric sulfate is used as a herbicide, symptoms of human ingestion usually are vomiting and nausea, unless Jake causes that I'd say it's safe.
It acts to keep the powder loose and it is approved for use in foods
It is found naturally in meat and other foods.
You may object to it being in Jake, but how to you address it being in your steak?
Phytoestrogen is a topic that causes distress in many people, and there are strong arguments on every side. However as stated the protein used in Jake is lower than most food sources. Do review the table of 50 foods in link 2. I cannot find the amount of phytoestrogen in pea protein other than an unsubstantiated claim that it contains none; but from the list of 50, I'd expect it be be in the collard greens region, or 1/10th of that found in yummy hummus.
I don't have the answers, I just have 5 minutes with google.
If the OP has valid concerns, please make them - we all would be interested. But I'm not even slightly interested in fear mongering and pseudo-science.