Mine is the same way. I've updated it through the phone app, but it didn't help. It's slower that a Blackberry tablet I have from 2010.
Getting it to read mp3's from a flash drive is a joke too. It works about 50% of the time, and stops working for no apparent reason. When it works, it's great. It reads the tags and even shows the embedded album art. But then you stop and start the car and it will just say "loading media..." and never do anything. You have to unplug and re-plug the flash drive.
The only thing that works consistently is the Bluetooth. But again, using the touchscreen to scroll my contact list to make a call in the car is horribly slow.