Giving puppy back, will I regret it?

I’ve had this puppy for a little over a week and simply don’t think I can do it any longer. Since getting him my mental health has significantly declined. I keep getting told that it gets better but I honestly don’t think I can make it without losing my sanity. He is pretty good and it’s a couple of things that I feel like I can’t keep living with like him biting, having accidents in the house, all the hyperactivity. I feel bad and have a lot of shame about giving the puppy back and really wanted for this to happen. At the moment I have no faith that it’s going to end up working out, I’m on the fence and not sure what to do. Any advice?