control box failure

Can I beef up the control Box for my VEVOR 1-1/2HP 4”Submersible Pump ? It's a 4wire 115V unit. Yes, you read that right..and hard on that poor c-box.1st time poster,long time learning here. Thanks for that,by the way, and for any advice from the forum.

So Sunday we lost water in the house and figured it was a compacitor that went out. I was correct in the matter but the reason for going out is from the control box getting water in it. The design of the well set up seems poor to me. The water is coming up throughout the conduit at the bottom...