I understand the What Ifs as well. It's human nature; especially if it's something that would have been in your control like the time or making a rider error in the dressage. It's really really common to look back at something and think "If I'd done X instead of Y, would it have been different?" I don't think it's fair to criticise Tina too much for that especially being SO close, it wasn't like she had a pole or 20 penalties, it was 1 second. I can see that leaving a bit of a bitter taste mixed in with all the other emotions.
She has now put up a post praising Banks & saying she's not been posting much due to being overwhelmed, which I can completely understand. It must be a lot, especially with the recent breavement, the stress of knowing they'll be moving etc.