That's pretty rubbish of your L and even if you don't go down the malpractice route I suspect it's the sort of thing that should be reported to the bar, if only to protect others.
If your L is that bad is there really no way to replace them? A delay might be better than a poor deal (I know not good choices) or are you confident you've got this covered now?
Your last couple of paragraphs reminded me if a phrase I first heard from an old boss but I suspect it comes from somewhere else:
its impossible to underestimate what incompetence is capable of
Anyway, I hope you have a good day.
Both mid 30s, 2 young kids BD 7sep14 XW moved on long ago, now living with OM1 D paperwork in progress