I think one thing that is also missed from retrospectively looking at HL2 is that a lot of the story was told in-engine, not a pre-rendered cut-scene from every other game of the time. Also telling the story with the gameplay and world building was pretty new at that point.
It is really easy to miss all of the things it did when so many of those things have been copied and improved on for the last 15 years, they no longer stand out.

I would also say I don't remember anyone at the time thinking that Doom 3 did anything particularly interesting. Doesn't mean it wasn't fun, but I think we can all recognize that there are many games that are fun that don't do anything new or interesting.

I was never that into Half-Life either, but I definitely recognize that it had a outsized influence on many games that came afterwards.