It's not bad, the track itself looks nice, but I don't know why you don't use object snapping. I never get that since I know you.

That can already increase the environment quality by a LOT.
Try to make your object verticies pixel perfect, so while using snap feature, the sides alignes perfectly.
The video itself isn't special, just rendered run (that was probably rerendered in movie maker, because I see the low bitrate). If you don't want to edit anything in external software, upload the pure rendered file from Mediatracker. That results the best video quality possible.
And I feel sad for your hater/s, although, you need to ignore it, like "remove the dislikes" like there are none and just don't care. The hater's fun will dissapear soon. I bet he knows this forum and just looks how you gonna react.