The only anchor in reality appears to be Biden suggesting that they knew how to take it out which seems like a pretty weak place to build a large story.
What I find particularly odd is that this entire thing appears to be based on a single, unnamed source "with direct knowledge of the operational planning".
I disagree - there is no credible motive here for Russia and, in fact, the outcome was directly opposed to every outcome they are, or were trying, to achieve.
Not only do I, as a US citizen, believe that the US perpetrated this act but further: I believe it is an overtly hostile action against EU citizens and, particularly, Germans, who will suffer the most economically.
EU states are now buying US natural gas like we always wanted them to. How much pain and suffering were we willing to inflict to make that happen ?
https://en.wikipedia.org/wiki/Baltic_Pipe
Putin was still trying to energy blackmail Europe back then. It is hard to see the explosions as anything else but a threat that the Baltic Pipe could also be blown up -- and the Nord Stream pipes weren't very useful to Russia at that point so it wouldn't cost much to lose them.
Also, given the climate now, if there was even a shred of evidence or any hint that Putin did this, US media and intelligence officials would be blaring that from every rooftop and every talking head would be "Russia this", and "Russia that". I think the relative silence speaks very clearly.