I think the only fault of Worksman here was poor QC in shipping an incomplete bike. But they made that right.
Not to be (overly) insensitive, but if you are not capable of assembling a bike from scratch, or have never done so, then I wouldn't recommend that you try to do it. This is why bike shops don't sell customers unassembled bikes still in the box-- so they avoid the liability if and when that customer puts the bike together incorrectly and it falls apart later. I can guarantee that the fine print on the warranty says that the bike is only covered if assembled by a shop/professional. Chalk it up as a learning experience. And that axle can be recentered. A decent bike tech could fix it in a matter of minutes, most likely.
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