15 years later, I'm in my 30s and I cannot even look at most modern 3D games. First-person games are an absolute no-go and third-person games are a toss-up. I missed out on a ton of games[1] and had to drop quite a few[2]. The ones I completed, I did so by forcing myself through the nausea[3]. I've even tried to go back to games I used to play[4] and even those kill me. It is really bad and at this point I mostly just play 2D games like Caves of Qud or top-down/isometric games like Disco Elysium.
The accessibility options in a lot of these games do help a bit, but it is never 100%. I usually turn things like camera shake/head bob off, lower graphics settings, tone down particles, mess around with FOV, adding a center dot... the whole kit and caboodle. At this point I'm not really sure if there is anything else that could be done to help me out, but I still really appreciate it when devs think about people with motion sickness issues.
[1]: Never even touched Overwatch or PUBG
[2]: I wish I could finish DOOM 2016 and Armored Core 6
[3]: The Witness and all those Resident Evil remakes have caused me countless hours of joy and pain, Elden Ring was mostly fine but some sessions I had to stop early
[4]: I will probably never beat HL2 again