Well, you chose really tough plants, which is a good start.
I'm guessing your soil is too heavy and retains too much moisture for your plants. You need to use a houseplant-specific soil or just mix your own. Miracle-Gro moisture control is meant for outdoor use in areas that are dry. What makes things worse are those pastel, plastic pots. I have some of those, so I know for a fact they're very poor draining. Mine are outside in full sun and it still takes DAYS for the soil to dry.
I think you should get your houseplants out of that soil at the very least. The best thing overall would probably be to get terra cotta pots to replace said plastic ones.
The pothos and philodendron will probably make it, but the outlook for the others is not good.
