[PICTURES] How to improve the unrealistic, weird light

Hi everyone,

I hope you know the answer to this puzzle! I have been working on this home, and I think the light is what makes the image quality so low. It looks very unrealistic, artificial. There is a weird blur or overexposure or maybe it’s something else. Good textures (that look good in Corona render, for example) look really bad here. What do you think is the problem?