Yeah, that window would bother me. What does the window on the opposite side of the slide look like? It appears that the top horizontal edge of the window is wider than the bottom edge. Sub-par window or maybe an install error. I remember seeing the windows installed when I took the factory tour. It takes the workers (one inside, one outside) about a minute to install a window! My 8280 large slide is in right now but I will check the windows when I power it back up.
2014 Rockwood 8280WS
2010 Tundra 5.7 Dbl Cab 4x4