There's a lot to unpack here but first I want to say you did a good job setting yourself up for success with that setup. Now you can move on to the more nuanced parts.
It looks like you had some old potting soil and mixed it with yard dirt to stretch it out or just bought the cheapest thing at the garden center.
Most of those plants are showing potassium issues among other things. This can either be caused by a true deficiency in the dirt or by being "blocked" by other conditions like pH, poor watering practices, environmental conditions and other nutrients. One of the most common that blocks K is Ca. The reason why is because so many people's water is loaded with it.
Just taking a guess based on my experience, you are probably over feeding them or not watering them properly. Your plants look like they are in a reverse osmotic situation in the root zone. This happens when the level of salts in the root zone is greater than in the plant and the soil is actually sucking the life out of them.
I've been in your situation before and that's what immediately came to mind when I saw your post. Of course that's all a guess unless you fill us in on exactly what you're doing besides buying really nice equipment.