My little brother got like this but then his phone broke and he couldn't convince our dad to get him a new one so he'd use my laptop a lot and he'd get my youtube recommendations. Watching stuff like second thought and kurzgesagt dewormed his brain. So if you can I'd say try watch some leftlib /sciencey stuff on his youtube account and maybe like and follow some leftist stuff on his tiktok. Get the algorithms to do the work for you