We're sorry to hear about your experience with your dimmer not dimming your lights enough. The MA-R does not control the dimming of the lights and works more like a remote for the master dimmer. Depending on the master dimmer being used you may have the option to adjust the low end settings for the dimmer which would increase the dimming range. If you're using the MACL-153M as the master dimmer you can use step 8 of the included guide to adjust the low end trim of the dimmer: https://www.lutron.com/TechnicalDocumentLibrary/0301629b.pdf
We also suggest making sure your dimmable LED has been tested and approved by Lutron. We have a mobile-friendly web tool to help you select bulbs that perform well with Lutron dimmers. To use the tool please visit lutron.com/ledfinder.
If you have questions or concerns, please reach out to our Customer Support team at support@lutron.com, or call us 1-844-LUTRON1. We're here 24/7, so please call us any time!
Mike S. @ Lutron Support