AM16

i'd consider kz am16 balanced. high value set, nicely detailed and technical set nice for pinpointing footsets but has a nice amount of bass for immersive games and your music genres which tend to like some bass boost if those are out of budget tripowin vivace are a nice set for fps and should do everything else pretty well too

if you want v-shape (actual v-shape not mild v-shape) then juzear clear are very good. excellent bass extension + quality and you get alot of it. bonus points for the very good included cable if you want something fun but still technical then kz am16 bass version

I listen to all those genres. Xenns Mangird Tea Pros are my daily drivers (and they play those genres and anything else I've thrown at them really well) and are highly recommended by others for gaming too. If you want to do it on a shoe string, I'd recommend the KZ AM16 Balanced, although I don't find them very comfortable. Don't expect the sort of bass from either of them that you'd find in a pair of Soundcore buds, but you can always learn how to EQ bass in if you need more. Sound stage is adequate with both those models (IEMs aren't really about soundstage, compared to a set of open-back over ears (I have a set of Hififman HE400se and the soundstage on them is miles better than any IEM I've tried), imaging much better with the Tea Pros. What headphones do you use at the moment?

If for you it sounds better than chu 2 it's good upgrade, for me am16 needs a bit of eq to sound good (much better then chu 2 imo), try this eq in any eq software https://preview.redd.it/kkrrdgyjkblg1.jpeg?width=1439&format=pjpg&auto=webp&s=a3799a8f955fc2e1c785819b09807c1314ad15a4

I explored cheap stuff, frequency response graph and different reviewers, audio amigo is quite objective even with iems that isn't up to his tastes, i don't always agree with him, but I think he do good quality reviews, also ignore rankings, you first need to explore different sounds signatures and find or what you like and what not, maybe get cheap iem that responds well to peqing it and play with it using peqdb to find your preferred sound signature (if you go this route imo kz am16 or kz prx are good options, both are cheap have decent technical performance and responds great to peq), after that you can look for iems with similar sound signatures and find reviewers with similar preferences

Good for the price, you need to go to good 50$ iem to get something really better (kz has some better value sets below 50$, like kz duonic, kz prx, kz am16 (with peq), kz zs10 pro 2)

In all honesty, yes: I have the og Castor Harman, the Zvx pro, the Prx, the (CCA) Rhapsody, amd the AM16 Balanced, and they're all banger, banger sets. I've been lucky and haven't faced breaking QC issues, but then again, what brand doesn't have QC issues?

I can suggest the Tinhifi C3 mk2, really comfy semicustom shell. Or the og Celest Wyvern black, semicustom as well, and can be had for cheapo nowadays! If not, the EPZ Q1 Pro or the EPZ G20 (same shell as the Q1 Pro, but gaming oriented, also comes with a 2m usb cable that supports a boom mic, and its inbuilt dac can be PEQ'd with the Walkplay app). To me personally the shape of the CCA Rhapsody and KZ Am16 is super comfy, but i kinda have bigger ears!

Kz Prx, kz am16, and Tinhifi C3 Mk2!

I will speak to your mobile setup for $100. For DAC my choice would be the TRN Black Pearl or Hiby FC4 original version (no screen) for having good sound and powerful 3.5 and 4.4 mm ports. For the IEM I recommend the KZ AM16 balanced, a very musical IEM which might be the best all BA set under $100.