I think this goes for most Millennials and 2000's kiddos.
It would be unfit to generalise, but one pet peeve I've observed, at least from my community, is the political discourse.
Young people getting into politics? Great! Do they do their research? 9 times out of 10, probably not.
I'm not claiming to be a political guru or a Political Theory PhD, I'm neither of those things, I'm just an avid reader and a curious third party of sorts. I like to keep up to date, but politics in my school year has become somewhat of a pop culture/bandwagoning thing. Basically picking on the easy guy, not actually challenging or having any sort of real definitive discourse or even a justification of their choice. One guy I knew said he was 'pro-remain', (I'm not going to turn this into a debate, because there were Brexiteers who did the same in my community, I'll get to that later), I asked them 'So what made you side with remain out of curiosity?' He stuttered and later said that it's only because his girlfriend and group of friends are doing it. This kind of sheepish bandwagoning proves that the nation aren't exactly producing the brightest minds the world has ever known.
Then to the edgelords. There is one popular opinion, and then there are the people who are looking for an attention grab and wanna look cool or edgy by voting for a radically opposite or 'unconventional choice'. I knew many people who were genuine Brexiteers and did their research, however there were a few who only did it so they could counter what everyone else (a Remainer majority) said to 'stand out'. Even to the point where there were quite a few Communists brooding within the community, so they could stand out.
Don't get me wrong though, I'm sure there are people who do actual research into current affairs, there is hope, I just hope that people do more reading and gain more critical thinking as opposed to bandwagoning onto random trends and unjustified politics.