Hard rejected track, would welcome some feedback!

My track Upbeat & Motivational has been hard rejected as not of commercial quality. I would welcome an feedback as to why, and how I could improve them going forward. Thank you!

I think the mix is letting you down.

The piano samples sound a bit cheap and synthetic IMO (and too much verb for me). It also sounds a little dull and muddy to my ears.

Thank you so much for your feedback, its much appreciated!