Futuristic buildings

Here I made a few futuristic buildings. My friend says they look horrible. What is your opinion?
(Click to enlarge)
3 different factories

Satellite dish (somewhat futuristic)

They looks like tiny models made out of plastic, not buildings. Not enough geometry there.

Need a lot of improvement. I assume it’s supposed to be low poly for some kind of RTS sort of thing.

Scale them accordingly so they are 1/16th standard scale, give them much more detail for use in skyboxes.