I suspect that the Epstein credits played a role in Betty not hiring a good lawyer. Every expense paid on Betty's behalf since their separation, which I assume would include legal fees, would be deducted from the lump sum settlement. That's how Betty ended up with a measly $28k as a lump sum. All of Dan's payments to Linda to cover her bills were deducted from what may have originally been an $800k settlement. No doubt a good lawyer could have managed to get her a bigger settlement, but how much of that would be eaten up by legal fees? I guess that's a risk Betty did not want to take.
This show has taken me on a emotional roller-coaster where Betty is concerned. One minute I think she's a nutcase and get why Dan left her, and the next I think Dan's an asshole sociopath and I get (but don't condone) why Betty killed him. I suspect this is what the real Betty engenders in people - love/hate.