Don’t receive instructions so it took a while to figure out how to attach the arms. 3rd time was a charm

It was a lot smaller than what I was expecting and when I sit on it it does not feel like it’s going to last very long. You somehow shift to the middle in between the two seats even if you start out on one side. The size is definitely good for smaller apartments I am just not satisfied with the quality and it is not for me. The arms of the chair also would not attach, I am not sure if the tracks were bent or what the issue was, the packaging for screws for the feet was also not sealed properly and missing one screw and bolt.