I have very recently served on a jury which was discharged - not because we could not reach a verdict, but because the prosecution withdrew its case after the first day of evidence.
People on a jury are just ordinary folks. In fact, it skews to an older more educated demographic as the starting point for choosing a jury is the electoral register. If you are not registered to vote, you won't ever get selected. And how much has been in the press about how a disproportionate number of young people, students and some minorities are not registered? Many people can easily get excused by having their employer write a letter saying how essential they are. On our jury there was a mix of people who were self-employed, teachers, retired folks, public sector workers. Nobody who couldn't follow the evidence or what the judge was saying. I'm not saying that you'll never get someone who is incapable of following the evidence on a jury, but that this was not my experience.
When you are on a jury you are told that you are looking at the specific charges ONLY. The case I served on was a domestic abuse case - do I think the relationship was toxic and there was lots of rows and violence and that the accused was a bit of a bastard? Definitely. Do I think the Crown presented enough evidence for a guilty verdict on the specific charges? Not at all - "being a bit of a bastard" is not a criminal offence. Similarly, you can't find someone guilty of a woolly charge of being a bad parent and making poor decisions. The Crown has to prove beyond all reasonable doubt that crimes were committed.
A deadlocked jury does not mean that they were thick and couldn't understand what was going on, it means that there were strongly held beliefs for both guilty and not guilty, and that neither "side" was prepared to change their minds. In Scotland there are 15 on a jury so there can never be a 50/50 split.
Finally, however many podcasts you've listened to and news articles you have read, you do not have the same information as the jury who sat through hours of evidence each day. Trial by podcast is not a thing.