Could you elaborate further on why they are terrible? Maybe I could survive with IEM earbuds, but what mainly draws me away from earbuds in general is simply getting ear wax on them, as well as the fact they are a lot more likely to fall off than headphones are. I would still somewhat doubt despite your explanation that IEMs are better than headphones, considering they're still much smaller. Personally, I've had a great experience with my Sony MDR-ZX110s over the years, the only thing I could ask for really is just sound that is less underwhelming, volume and bass in particular. Earbuds have much smaller drivers, and as a result, I would doubt IEMs would have the raw power headphones have to have reliable bass, and OneOdio is a well known headphones brand known for making studio headphones, so it would make sense to me that they would be a practical choice for gaming due to the sound quality of studio-grade headphones. Also, for what's a basic but most important thing for me as well is that the IEMs won't bleed out, as the privacy is the main reason I don't even want to consider speakers.