this is dumb, you still have to parse info either method of interacting with the site, its just slightly diffrent, some people can just filter out info they care less about a little better. if anything has to do with the so called divide between generations (i always call bullshit on this, people are far to complex to be put in these boxes) it may have to do with how people first started interacting with the internet. people who have been interacting with the internet for longer may be more accustomed to the fourm style of website, where as people who started using the internet on their phone may be more accustomed to the app style layout. it mostly boils down to learned ways of interacting in online spaces, not how old you are in my opinion.
often people who are repressed will find ways to express feelings they dont understand even in unhealthy ways. its not an abnormal reaction to lash out at people who you dont realize are a lot like yourself, because you are dealing with the learned bigotry and hatred that society, and by extension you, are placing on yourself. now that you see what a powerful effect hatred can have on somebody, how it can warp and skew their perspective, i think its time to let yourself accept some love, and the healing power it has, dont be too hard on yourself, just work on improving yourself.