cant see your pics.

can't see them either.

This link works:

Rather than use a moisture meter, dig down a bit and test the soil moisture by hand.

Letting it completely dry between watering

Maybe "completely" isn't a good idea. Of course your definition of "completely" and mine may not be the same.

You don't indicate where you live or even your gardening zone. We need that info.

Depending on that info I see several possible problems.

(1) poor, inconsistent watering methods leading to heavy stress, shallow rooting, root rot, and possibly poorly draining soil (no such thing as "organic soil" so what are we talking about?). How much and what type of compost? Any possibility of weed killer contamination in it?

Consistency in soil moisture levels is the goal, not one extreme to another. Consistent low moisture levels. And moisture meters are notorious for being inaccurate. Use your hands. Tunnel down to the 6" level where the root are and feel the soil

(2) way too much soaker hose in place for such small beds contributing to watering issues.

3) the wood chip mulch - never recommended for vegetable beds - binds up nitrogen and attracts pests especially slugs and root maggots.

4) all the Neem oil spraying. It causes its own issues with plants when not used and applied properly. Use when needed is one thing. Regular use when it may not even be needed is something else entirely. Application times, methods, and amounts are critical.

Sorry but IMO you are going to have to make some major changes in methods to save those plants.

Dave