Here's a short list of games I never played or only played for less than 30 minutes:
- Team Fortress 2
- CounterStrike 2
- DOTA 2
- Halo games
- Fortnite
- Unreal Tournament
- Zelda games
- Sonic games
and theres way more popular/iconic/classic franchises I never played because I hardly ever played on consoles (never owned one myself apart from a used PS3 for a while, and hardly ever played on that) and Im also not big into multiplayer/team based games (apart from WOW and Overwatch 1).
Conclusion: different people, different tastes/interests