I hadn't heard of it, so I looked up your ruby falls weeping redbud:
a beautiful little tree.
Yours clearly isn't doing well.
You are clearly watering wrong, but oddly enough it is hard for me to say if you are under or over watering (or a bit of both!), because you didn't say how/ how much you water when you do.
Four times a week sounds like way too much. But if you are only sprinkling or only watering the surface, it could also be too little. What you want is to water deeply to encourage deep root growth, and then no more often than you need to. A newly transplanted baby tree, you don't want to let dry out, but waterlogging and staying soggy is killer.
To start with, I recommend you water it how ever you usually do and then when you are finished, dig down and see how deep the soil is moist. You may be surprised to find out you have only been watering the surface. When you water, you want to do it as deeply as you can, making sure at least six inches, if not more, of the soil has been moistened. After you find out what it takes to do that, then you can borrow and upsize a technique from bonsai. Take a wooden stick and push it six inches down into the soil, out by your tree's drip line and leave it there. A few days after you have watered deeply, pull your stick out and check to see how far down the stick is damp. Don't water again, until a lot of the stick is dry.
Do NOT fertilize your tree. It is nearly October. Your tree will be going dormant soon. The last thing you want to do right now is encourage tender new growth that will just be killed by frost.
Welcome to the Forum. Sorry you didn't get a more prompt response.