As a Zone 6 grower myself I've followed your issues with interest and the problems you've encountered seem to be all over the place but have one thing central IMO. So I think a history of your growing might help:

6/22-I just received my chili plants.

7/8-Are these leaves healthy?

7/12-Help!!! What's wrong with my pepper?
(Upper leaves wilting.)

7/8-Are chinenses all VERY slow to grow?
Stuck at between 2-3 inches of growth.

7/8-Arroz con Pollo pepper plant, what's wrong?
When I pulled out the plant the roots had not grown at all and were dryish and brownish.

8/6-One side of this pepper plant dying?

8/10-Need help growing Peri Peri, Capsicum Frutescens, pepper plants
Now, the leaves are yellowing and falling off, tens and tens of pods that had formed are drying and falling off, the stems are drying.

8/19-Flowers drying and dying before maturation and bloom
On most of my pepper plants, mostly the temperate climate ones I think, whole flushes of flower buds are drying, yellowing and falling off.

8/22-growing tips of pepper plants drying, sickly....?
All my pepper plants, save one or two, across species and varieties, are having this problem. The growing tips are sickly, drying, wilting and not growing.

In all my years of growing, about 20, and offering help on forums I've never seen anybody have such varied problems. The first thing I noted is you're a novice and it makes me wonder about your garden bed preparation, the central issue - the soil. What did you do to the soil before covering it with the weed block? Did you add any amendments like peat or compost? Did you add any time release fertilizers? Next is the weed block covering the soil, it helps retain moisture so your soaker hose watering regimen needs to be correct because most of these issues can be caused by roots suffocating due to over saturation, they need air too! And last but not least is your devotion to your babies, while concern important, I've found the below lifted advice very helpful for new growers of Capsicum:

In closing, I realize that the above sounds like a lot of info, so I'm going to pass along something that a very knowledgeable person said to me once: that peppers thrive on benign neglect. Give them lots of sun, some good soil, adequate water, and feed them once in a while, and relax and enjoy them!