I would argue that by this logic, your ability scores also fall to 0, killing you
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The spell specifies you turn into gray dust. Unfortunately gray dust has no listed stat block.
Luckily it is mentioned in "Tales from the Yawning Portal", "The floor of this room is covered with a layer of fine gray dust and ash, three inches deep."
Based on the rest of the description you are restricted to the room in which you turned to dust and the only action you may take is casting " Minor Illusion", with the added restriction of all illusions must be humanoid.
That's probably the path I'd take as a DM if I had a player insisting on rules lawyering like OP. OK, you get to "play" as a pile of dust. Have fun sitting there until random wind currents blow you around.
*ahem Subtle Spell has entered the chat. Cast any spell that doesn't require a line of sight target and that doesn't require material components or otherwise rely on an "attack" or similar action. Like say Guardian Of Nature. Or, if you want to get REALLY pedantic: Dimension Door.
Crappy party mates you have if they won't even scoop you up into a bag and carry you around.
If a guy is doing what you're doing in this thread at the table, then yeah, I'd support them in leaving you there.
Doing what? Trying to play by the rules? It's a game! Games have rules. If you can't accept someone living out their pile of dust fantasy, which is clearly supported by the rules, then I think you need to take a long look in the mirror and ask yourself who hurt you.
You are 100% free to live out your pile of dust fantasy. I let you be a pile of dust. Isn't that what you wanted?
Nothing about the Disintegration spell says that your stats change. Compare to spells that do, such as Polymorph, or True Polymorph which even covers changing a creature into an object.
I'm not changing your stats, you still have a 14 wisdom.
You are however definitely turned into gray dust and I'm applying the rules as written about gray dust. The gray dust is restricted to the current room and can only form the shapes of various humanoids.
This reminds me of Torchwood
Well memed, but it's no fun to try to argue with someone who will take everything in bad faith, even as a joke.
You can be literally obliterated by a sneeze. And you're so dusty, folks would need to make a Con check for allergies.