I think Facebook is still that for most people. I think the narrative of widespread social addiction and "mind control" through social media is intentionally overstated to serve a political agenda. These problems to exist, social media can be addictive, misinformation does spread like wildfire, but I fear focusing on "algorithms" as a whole rather than the sources of misinformation or the companies running the big platforms is an attempt to make information and communication (and by extension political organization and action) more difficult in the long run.

Most people's proposed solutions seem counterproductive. Making social media illegal and banning it entirety removes a valuable means of communication and networking for people. Forcing all social media platforms with n> users to be nationalized means all platforms that might be useful for activism will be controlled by the government. Forcing them to only use strictly alphabetic or chronological listings makes access more difficult, but doesn't necessarily remove polarizing or false information. Repealing Section 230 would cripple speech across the internet and make it impossible for platform owners to police minsinformation and hate speech without taking on legal liability for themselves. All of these solutions at least implicitly serve the interests of authoritarians and all of them only seem reasonable because of the current moral panic around social media.

famously the Arab spring

also BLM, israel palestine

and the genocide in myanmar, that was definitely accelerated political action

There have been plenty. Surely you aren't arguing that social media has never done so. Arguably social media has been one of the most catalyzing political forces in human history. And bearing in mind that "political action" can be in any direction, I found some examples. I didn't work very hard because this could have literally been a Google search on your part.

Arab Spring

Nepalese Discord Protests

Euromaidan revolution in Ukraine

2009 Iranian presidential election protests

2011 Egyptian revolution

#BlackLivesMatter

#MeToo

Hong Kong protests

#NoKings protests

Yellow Vest protests (France)

Anti-Israel/Pro-Palestine protests

Anti-vaccine protests during COVID

Rohingya genocide

GamerGate