To me, Leah is trying too hard. There is a reality show playbook today that says if you aren't interesting and outrageous, you're gone. Leah wants to secure her spot for next season, so she jumped on the hot mess express.
I think Dorinda is in a lot of pain and she's trying to drink it away. Is she an alcoholic? Only time will tell. Right now, she's a very heavy drinker. I think Dorinda hates that she's not where she thought she'd be at her age. I think that's why she went after Tinsley. Tinsley is in the beginning of it all, engaged, going to be married, have a family, etc.
When you're older you know that eventually it will end. Dorinda is a widow, she knows that if you live long enough, you see that nothing lasts. That's true. I thought it was cruel for Dorinda to bully Tinsley, let the woman have her time, because it's not going to last.