Roadworx Wallmount 2

Let's start that I find it appaling that this does not come with any screws. This is a heavy duty stand and it should come with at least the screws that secure the plate to the stand as these are pretty vital to the sturdiness and balance of the speaker.
Upon installation, I realized that one of these plates (this is the metal sheet that the speaker sits on) does sit at a slight angle to the supporting beam. This means that when the monitor is placed on it, it is slightly askew and this feels me with enormous anxiety that the weight of the speaker being unbalanced will snap the screws that support the plate.
So if that happens who should I hold accountable for a destroyed speaker?
Quality control level 0.