I shot one for the first time last night at an NRA basic pistol class. It shot to point of aim, was very popular with students because of the ease of loading and slide racking. It was brand new, shot to point of aim for me. Had a couple of stovepipes in the first 50 rounds. One caused, I think, by failure of the student to seat the magazine. The other, who knows? Obviously needed some break in rounds down range.
Oh, by the way, welcome to the S&W forum. We often have new folks whose first post is to complain about a S&W product. As RVGshooter noted, we have no idea of your shooting experience. No offense intended, but your use of terms like clip instead of magazine, bullet instead of cartridge, may indicate you are a new shooter. It would be helpful to know for example, how far left is point of impact at what distance? How many rounds total through the gun? Have you had an professional instruction in handgun shooting?
Often we recommend that someone else shoot a problem handgun as a way of determining if there is a possibility of operator error. Too late, since you have already sent the pistol back to S&W. I don't intend to diminish your complaint, as it is entirely possible that the problem is a faulty handgun. It has been known to happen.
However, a compact handgun like the Shield is particularly sensitive to limp wristing, inconsistent grip, or other shooter issues. As noted above, one problem with the pistol in the class was the failure of a student to properly lock in the magazine.