There's mostly only a few things bugged with this map

1: This area of the map by the long steam pipe has standable air when it most definitely shouldn't, and some unbreakable boards that were breakable in the original map

Below is some screenshots I've provided:

https://imgur.com/a/8Tz4qlE

2: Assets overriding other assets. Now this isn't your fault, Valve mostly did this to save resources(and I wish they just made them separate models instead so this wouldn't even be a problem), but some assets you've used, mostly L4D ones, are overriding most of the default Half Life 2 assets, and even in some cases will break them if you load a different map.