Jimaroid
Journeyman Pro
No you’re not alone, I remember getting to a level where you just kept going around and around, same enemies wave after wave. It bored the shite out of me so I ditched it and I’ve never played a Halo game since.
I absolutely hated the Library and still do. They certainly learned the lesson of that in subsequent games. Halo 2 was much less frustrating, but it also regressed some of the AI which made the skirmishes less dynamic and fun. I'm of the opinion that The Flood were a cheap trick that didn't work in Halo, I get what the intent was but it looked and felt bad.
No Counter Strike makes this list null and invalid.
Controversially, again personal opinion, a long time ago I decided I just don't enjoy Counter Strike all that much. I 100% respect its rightful influence in the landscape and I've played it for hundreds of hours! It's just not for me.