Why would we bash your comments? Its an opinion - one that some will relate to, and some will not.
I'd suggest that for some who want perfection from the get-go, then the M3 won't be on your radar. And if you've come from an Apple or Sony eco-system, then the Fiio UI will probably seem cumbersome, unintuitive, and unprofessional. And that's cool - for your preferences, the M3 doesn't work.
For someone like me, who has been through a lot of other DAPs - including many very expensive ones with fantastic hardware and very basic UI's - then my impressions and tolerances are very different. I'd suggest anyone going from a Studio Anniversary 3rd (tiny device, long battery life, sounds fantastic, costs $300+) to the M3 would have a ttally different view of how good the M3 is. And therefore, opinion is a matter of perspective.
I
love this little device. It works (I ahven't had a crash in almost 2 weeks). It's tiny. It has great battery life. It sounds fantastic. And for my browsing preferences, I can negotiate my way around it easily, find tracks easily, listen to albums easily. I still can't believe for $55 I can pair this particular device with a pair of $600 Adel U6 IEMs and have a fantastic sounding truly portable rig.
But those are my preferences.
Yes - it has a few bugs - with Fiio's track record, they don't bother me. They aren't Sony or Apple - this is how they release, and get feedback, and correct, and evolve. If the Fiio model isn't for you - then take your wallet elsewhere. No harm, no foul, no bad words or bashing required. You're just not compatible with what they do.
Enjoy the Sony - they are also great DAPs. I'll continue to enjoy the M3.