Doom and Halo aren't nearly what they used to be. Half life game is a VR game so it is not equivalent to a Half Life 3 or traditional game.
I mean, you haven't played any of them. But counter points to consider.
1. Doom is likely going to be way better than it was in 2004. Doom 3 isn't horrible, but the new Doom series is incredible and is all about the rapid violent gory shooty fun that was in the originals, translated to a Y-axis 3D world. 2004's Doom is no contest.
2. Halo 4 and 5 were really not my favorite, but Halo 4's multiplayer really really improved, and 5's multiplayer is seriously good. I was very skeptical, but it's an excellent shooter. One of the most fun I've had in a multiplayer shooter, and I'm a pretty big Halo purist I feel like. The story in 4 was very meh, and 5's was worse, but the levels got a lot more open in 5 after being very very narrow and extremely samey in 4. Still have work to do, but on a lot of fronts Infinite is seeking to be a huge reboot of the series mechanically. They've said they want us to look at the art style for example, which has way stronger ties to the old halo, especially CE, as an indication they are committed to reevaluating learning from what the old games do well. I know they've done this before, but still, I think it's worth keeping your eyes out for and not writing off right away.
3. Half-life has always been at the forefront of technological innovation. I know that sounds like a PR piece. But it's true. Every time they do Half life is because they want to explore something new. The whole point of Half-life is not to be a traditional game. That has always been their focus.