(Im using Half life+MMod) But it should work with anyone who has this problem. Incluiding Mmod+Update Mod.
Some times is just better with out Update mod cause is outdated lol, but its all personal tastes.

1) If u have HDR disabled, enable it on FULL HDR, Apply and then restart your game.

2) In console use: mat_bloom_scalefactor_scalar 0.30 (Default is on 1) i played with the settings from 0.00 to 1 and after testing a lot, i found my sweet spot on 0.30 but you can adjust those number as you want to adjust the bloom at ur own taste.

3)For confort (and dont have to put the command every time you launch the game),On the shortcut ure using to launch the game put this in the steam launch options:

+mat_bloom_scalefactor_scalar 0.30

It solve the problem of saturated ligthing, using HDR FULL and with out disabling some cool bloom efects.

Hope it works for you.