Regarding your personal situation with your hair loss as a reaction to products - definitely good you stopped using them once you realized it is the products causing it. HIGHLY recommend a dermatologist visit to check you haven't developed a sever allergy to any common ingredients in hair products or something that might be an indicator of your internal health that needs addressing with prescriptive care.
Regarding Olaplex fears:
I saw a couple of Dermatologist videos on Youtube about this Olaplex lawsuit (a long story and no longer a concern since the ingredient of concern has since been removed as a precaution), and just Olaplex take home products as a whole. The main thing is, even hair stylists on YouTube will say, is that people tend to misuse Olaplex a LOT. I.E. thinking they can get away with using it more frequently than stated, leaving products in longer that stated, or not realizing the treatment products are NOT the same as styling products. They are powerful, next to salon salon strength professional products - using something too much or too often will inevitably having negative consequences. It just hits some people harder than others - it's tough, but that's life. Some people are sensitive to certain ingredients or formulations and you only find out when you try it, and you absolutely can randomly wake up one day and become sensitive and irritated by ingredients or formulations you were fine with for many years. I can attest to this with my development of a severe allergy to lavender in anything if it touches my face or I can smell it.
The only time you deviate from instructions on packaging is with professional guidance for such powerful product lines.
That's why before using any product I read extensively into professional and experienced users' guidance videos and blogs to understand if a product is safe for my hair and scalp type, and how to use it step by step. If I had just jumped on the Olaplex train when I was shopping around for all new products, I definitely would have destroyed all my hair because it took a long time for me to find out what my hair and scalp needs and how to strike that balance, even after asking 2 experienced hair salon workers for help.
A big thing nowadays is it's possible certain ingredients or percentages may be reformulated so impeccably sneakily that you may not even realize the same product you've used for years is now actually a new formula - and this is a big thing across cosmetics as a whole - so very well might be best case scenario that you are perfectly healthy, the product just changed a bit and now you can't use it as it upsets your hair ecosystem.
There are extenuating circumstances that definitely warrant lawsuits or at the very least intensive investigation (not sure if you've heard about the Devacurl lawsuit) that is due to no fault of the customer and the fault of those involved in the making of a product. But just read into things carefully, make sure there's sufficient evidence to back up comments you read online - there is a lot of fearmongering these days, so don't fall into that trap either.