I have something that could help yay, I think that the bad lifestyle habits he has can influence his reaction time, since he eats badly, I don't know if he sleeps well, maybe he stops practicing or on the contrary he practices so much that his sight is tired, I don't know but he should try to improve his lifestyle and give himself a break if he plays daily since I think that stopping playing about 2 weeks helps me at least since the eyes have muscles that focus and get tired, I should also use a high-end mouse I would recommend a RAZER viper signature edition or something with optical switches and a high probing rate
Ir maybe his pc is not optimized and tweaked idk , and I think that he should learn to play sentinel , I think yay could be a great sentinel and op player but isn’t a great raze player , maybe he should watch some aspas vods , for example I improved my Reyna on all maps with aspas vods and now I’m radiant with 1.35 K/D :O
And I notice yay lost confidence and that is a huge problem because if you don’t trust in your aim or skills , is difficult to win duels