You opinion is bad it wasn't a bad game it's quite fun.
I never said it wasn't fun. I said it was a bad game, and it is. For you to imply that graphics mean little makes me laugh - in a story driven game like Half-Life, they matter all the more than they would in some generic shoot-'em-up title. Graphics are not only the quality of textures and models but are also stuff like sound, voice acting, animation quality, things like that. Graphics are as important to a game as the rest of it's components (controls, gameplay, level design) and while some games age well in that regard (see: Paper Mario), others don't, and as a result the impact of the story lessens.
Half-Life 1 was built during the early era of video games and because of that it has a lot of issues that, through trial and error, have been effectively worked out of game development during our current time. Aside from the distinct lack of life in the boxy areas, there are also the jerky, unbelievable animations coupled with poor sound quality. Even still, there are actual gameplay mechanics that are obsolete, along with level design that, compared to current games, is atrocious. (See: Xen. See: On A Rail). I personally like Half-Life 1 but I don't let that get in the way of consciously recognizing it is factually a bad game. Yes, it's fun, but it has issues that are glaring and can't be ignored. Black Mesa will resolve most if not all of them.