This is not actually explained in the article.
It rightfully explains how X, meta and others have taken a turn for the worse to say the least, but it doesn't say why I should delete my Facebook or Twitter account.
Neither do the hundreds of calls to delete such accounts in the past few weeks or months have.
I get that the point is "You should stop using such social media", but I don't get what __deleting your account__ actually adds on top, especially when put in relation to the political reasons behind stopping to use them.
Even if the TOS doesn't require this so you can actually sue they would likely have a choice of venue provision that would make it inconvenient for you and/or a choice of law provision that would be favorable to them.
If you have an account at the site it will likely be very hard to get out from under the arbitration/venue/law provisions of the TOS.
If you no longer have an account you will probably have a better chance of escaping the TOS, especially if whatever you want to sue over took place entirely after you deleted your account.
Isn't it a tautology? If you continue using a product that sucks rather than abandon it, you're using a bad product and it also has license to keep getting worse. Deleting an account is the strongest signal of rejection.