The freer the movement, the harder it is for AI to predict moves.

The smaller the field of vision is compared to the entire world, the more scouting is needed before the AI can build a large enough picture to start planning ahead, and the more it needs to rely on the ability to predict.

Chess has a 100% visibility and very limited movement, so it makes sense for it to be easy for AI.

But in shooters, both of these limitations are devastating. The only advantage left after this is the instant reaction time, but this feels cheap and isn’t fun for the player, so instead bots get put on A* algorithms, flowfields, heatmaps, pretedermined tracks, and shallow neural networks to determine where to go and where to look, and finally their aim skills are just intentionally set to miss at certain rates.