You pretty much got it, despite some contradictions. You suggested that individuals and groups are "spreading the lies and propaganda" and thus posit that they (individuals or groups) are responsible, yet you then go on to say that people spend lots of time on "these platforms" and that the "algorithms defiantly are responsible of pointing people towards" (distribution/broadcasting), which posits responsibility on the platform. So you recognise that the platform and method of delivery is exactly what is doing the "spreading". What you are describing in the end is exactly the problem. Let's take the Google App and it's feed as an example, which uses an algorithmic mechanism for presenting content to the user. Then consider the company behind the platform, which is super left-leaning. Then consider any biases and deliberate efforts by the platform to intervene, as seen before. Then consider there are upwards of 2.5 billion Android devices, a huge chunk of which could come shipped or have the Google App installed presenting such content via "swipe right". What do you make of that?