In all of the interviews I've been to recently, the interviewers continue to press me if I focus on their company and don't say something about why I want to leave my current employer.
After a particularly bad interview, I did start practicing for these types of questions and I'm getting better, but that's still relative. Part of the problem is that I've been in the toxic workplace so long and I'm so desperate to get out of it, that thoughts of escaping push to the front of my brain while I'm in interviews and I either blurt out something I shouldn't [1] or I just freeze up (think deer in headlights), typically a combination of the two which is even worse.
[1] I don't blurt out anything quite as bad as "my current boss is an ass", rather things like "My boss doesn't believe in bug trackers and I think they're extremely important." So far so good, right? But then there's a pregnant pause and I catch myself blurting out, "At least a client threatened to take away our business if we didn't start keeping bug records, so now we have 3-ring binders and paper forms to record our bugs. But that doesn't do any good when the same bug is reported multiple times in every binder and the boss doesn't actually look at the bug reports or give anyone else access to the code." At which point the looks on the interviewers face tell me I've blown it again. (Very true scenarios about our bug reporting and my idiotic blurting out in an interview.)