I recently learned that physicians are supposed to fill continuing education credits each year, and that one of the ways they can get those is by attending drug-company-sponsored presentations. Now I wonder if that has something to do with why it seems that some doctors are especially given to prescribing certain medications?
My personal feeling is that in the end, you need to do your own research and sometimes be a bit of a squeaky wheel if you don't feel heard by your health care providers/prescribers.
I did a quick search for the words: difficulty discontinuing theanine
and this came up
https://www.longecity.org/forum/topic/50115-l-theanine-does-it-have-a-withdrawal/

One of my biggest fears and hesitations about antidepressants and other psychoactive drugs is how difficult it can be to discontinue them, as you are experiencing with the Klonopin.
Also, it can't hurt to make sure your vitamin D levels are within range. I recently learned that too little puts us at risk for anxiety, while too much puts us at risk for insomnia.