You're not the only one, but it feels like there is a lot of opinion and conjecture flying around the facts which isn't helping.
Clearly there is an issue to be resolved at low SoC and temperature and Tesla themselves have acknowledged this. But its worth noting that 2021 M3P's had been on sale for 3 cold months before Bjorn posted his video in Jan '21. I don't think I have seen any discussions on this subject that started before that (although I suspect someone will now point me to some!)
I've clicked the links through to the various forums/threads on this subject and whilst it the Bjorn videos and associated data has generated a lot of discussion, I don't see much complaining from those with 2021 M3P's. (although I suspect someone will now point me to some!)
The OP in the recent thread clearly had a far more serious issue than than that reported by Bjorn and others.
As
@2021_M3P has said above, there are just too many unknowns at the moment ....I wouldn't be at all surprised if we found that in Q2 the LR's have a new problem and the P issue is fixed! Keep the faith!