I am not seeing these issues. Maybe you should contact nintendo for a replacement? It seems like people are calling the pro controller dpad shit because they read it on the internet.
Like I said if you press the button only when you want to be pressing the button there's no issue. If you mash your thumb all over the pad you are going to get the random inputs.
I have those issues with the pro controller d-pad. I even took it into the store and swapped it for a new one, but I have the same issue.
I've been playing street fighter on a pad (and on arcade stick) for more than 20 years. I've played with all sorts of pads and I can't think of a single d-pad that was less reliable. Even the crummy third party ones you'd get stuck with.
The problem, I think, comes from the fact that the centre of the d-pad is not pivoting on a piece of plastic. Instead the entire d-pad can be pushed in at once like a giant button (try this even with the wiiU pro controller, push the center in and you will feel a central fulcrum that the d-pad pivots on. It's not present on the switch pro controller). This is not generally a problem if you are doing quarter circle motions around the edge of the pad, like with a fireball. But when you are charging a sonic boom by holding left, and then quickly rolling your thumb directly to the right like you would with any other normal d-pad, you sometimes push the d-pad in, and you then get a random UP input. Completely screwing you in the process. This is not normal d-pad behaviour. It also will often jump straight up instead of at an angle.
It's a shame because everything else about the pro controller is beautiful.
Sadly I'm currently struggling through using the tiny joycon analogue stick of all things. Which is really ass, but slightly more reliable than the d-pad on the pro controller.
I'm still really enjoying the game, and my Deejay is currently ranked 3rd in the world (not much competition I think), but the enjoyment is more often than not hampered by shitty controls. When my 8bitdo controller shows up, I'm hoping that will be more of a normal street fighter experience.