Team Fortress 2 lagging a lot without reasons!

[Lat']

Yes I have a little problem with TF2:
Since one month the game started to lag a lot while playing netgames, first, I tought it was only a problem in MvM due to the amount of ennemies but I then realised that it happens very often, even when I do not see ANY PLAYER at the screen.

I tried may things:
Unistall lots of useless programs I installed recently
Clean up my hard disk
Tried to set the video options to ugly bullshit mod

After even reinstalling the game it still lags!

And a thing I don't know is that it perfectly worked when I installed it for the first time, even with a very detailed configuration!
So can anyone help me?

 

[Terra]

It's probably the fucking shitty new updates they've been putting on that make everything fucking laggy as shit.
Also, having too many mods increases chances of lag.

 

[Lat']

It's probably the fucking shitty new updates they've been putting on that make everything fucking laggy as shit.
Also, having too many mods increases chances of lag.

Then I do not have any reskin, I even use the standart HUD.
And with this I can't play the Spy, and the worst of all is that I bought strange weapons for him T_T.
Even playing the game in OGL doesn't work...

 

[The Zero Team]

Even playing the game in OGL doesn't work...

...Is it even possible to play Team Fortress 2 in non-DirectX anything? (There's a difference between "OpenGL" and "DirectX 8". A major difference. I think so, at least.)

 

[wolfs]

...Is it even possible to play Team Fortress 2 in non-DirectX anything? (There's a difference between "OpenGL" and "DirectX 8". A major difference. I think so, at least.)

This is Team Fortress 2. Not SRB2. It runs on multiple OSes as well. Team Fortress 2, last time I checked, supports both OpenGL and DirectX 10 renderers. You can switch between depending on what performs better for you.

 

[Mystic]

Why would you ask this question here instead of at the TF2 support forums?