I missed it live because of the lag. After watching this, it's definitely a lot better than many reports make it seem. It actually seems like it was a successful landing, but then tipped most likely due to the motion of the ocean combined with the relatively small supports. For an object that long and thin that's swaying, I'm surprised it doesn't have longer supports.
It tipped because a leg didn't latch, as mentioned in the article AND on the instagram video provided by @elonmusk.
Silly me...looked at it on mobile and didn't notice/acknowledge the 'More Information' button. I thought the link was just a video and caption.
They said something about ice on TV?
Apparently the thing that receives part of the leg and get it latched to the rocket was frozen (because of fog at the launch pad) and resulted in the leg being free and allowed to move.