Help me restore my settings to default

[What Is Schwa]

Help! Due to trying various configs and settings my keybinds and video settings have become mangled and terrible. My function keys do all sorts of random shit, and I can't see any overlays. Models are rendered all wonky, and in general my TF2 is unplayable.

Okay, should be easy to restore. NOPE.

Things I have tried and have failed:
Delete TF2 and reinstall
Disable cloud support
Delete my entire TF2 cfg directory
Overwrite my entire CFG directory with someone else's CFG.

So at this point I'm really irritated. I just want my default settings back. Seriously, what do I have to do?!

Edit 2/5/2012
Thanks to Sconno for a fix:

Steam Common Issues
Steam Cloud is preventing me from changing/resetting my config files.

Follow these instructions to reset the configuration for a specific game
Navigate to the store page for the game you wish to reset and get the appID from the URL
It should look like this: http://store.steampowered.com/app/<appID>/
Disable Steam Cloud
Navigate to “Steam\SteamApps\<username>\<game>\<game>\cfg \” and delete “config.cfg”
Navigate to “Steam\userdata\<usernumber>\<appID>\remote\c fg\” and delete “config.cfg”
Launch the game, allow it to write a new config file, then exit the game
Enable Steam Cloud
Launch the game and test the issue.

 

[Rexy]

When you say models are wonky, what do you mean?

 

[tyler]

If you mean a bunch of hats and things have the purple/black checkerboard, that's not your fault.

 

[What Is Schwa]

I mean the player models appear not quite fullbright, but have really awful bright lighting where they shouldn't. Hat and Items look like ass.

 

[Numerous]

Check your graphics card & drivers etc, submit a ticket to steam support, try logging your account into another (vanilla) computer and see if it screws up on that one, too.

 

[Firest0rm]

putting -autoconfig in the launch options may help, it resets all of your config stuff to default

 

[What Is Schwa]

Thanks to Sconno for a fix:

Steam Common Issues
Steam Cloud is preventing me from changing/resetting my config files.

Follow these instructions to reset the configuration for a specific game
Navigate to the store page for the game you wish to reset and get the appID from the URL
It should look like this: http://store.steampowered.com/app/<appID>/
Disable Steam Cloud
Navigate to “Steam\SteamApps\<username>\<game>\<game>\cfg \” and delete “config.cfg”
Navigate to “Steam\userdata\<usernumber>\<appID>\remote\c fg\” and delete “config.cfg”
Launch the game, allow it to write a new config file, then exit the game
Enable Steam Cloud
Launch the game and test the issue.

 

[dontshootme!]

THANKS YOU VERY VERY VERY MUCH (n time)
Only this is working!!!!!

 

[Corfix]

I had thes to