There's a lot of debate about what exactly "propaganda" is, but in general, it's any kind of message that's intended to promote a particular point of view. So, it's not surprising that you're seeing a lot of it on Reddit, which is one of the biggest platforms for online discussion.
There are a few reasons why propaganda is so prevalent on Reddit. First of all, the site's structure encourages people to submit links to articles and videos that they think other users will find interesting. This can sometimes lead to people submitting content that's deliberately designed to push a particular agenda.
Secondly, Reddit is full of anonymous users, which means that people can say whatever they want without fear of repercussions. This anonymity can sometimes be used to spread hateful or misleading information.
Finally, because Reddit is so popular, it's often used by people with a political or ideological agenda to reach a large audience.
So, yes, you're definitely seeing a lot of propaganda on Reddit. But it's important to remember that not all of it is accurate or truthful. It's always a good idea to do your own research before you believe anything you read on the internet.