Welcome to the forum.
Kind of a dark image, don't you think? All you're missing is a dead body on the floor. LOL
Did you model everything in the scene or are these Evermotion models?
Here are my thoughts:
I don't like the spacing of the poison pills. They are too perfectly placed.
It would be better to have the glass turned over on its side, next to the spilled water. Otherwise, why is all that water there?
The label on the pill bottle is upside down.
There is faceting around the edge of the table. It doesn't have a smooth curve.
The outside environment needs work. Using an image is ok for stuff that's off in the distance, but you need a real 3D tree if it's going to be right up next to the window.
The walls are splotchy. This is usually a result of low quality render settings. You may need to bump up your settings.
Other than those things, it's not a bad looking render. Just needs a little tweaking.