It's very hard to tell if Mcbride dropped Lentz or if Lentz slipped, the only shot that looked like it landed was a grazing hook that hit the back of his head, either way it didn't look like he Lentz hurt.
Here's the thing with Holtzman, everyone is judging him on his performance vs Patrick, that performance is kind of an outlier. And no one fully understands the variables which lead to the outcome of that fight. Maybe Patrick was injured, maybe he was off the juice, maybe he was overrated or maybe Holtzman is just that good, it's hard to say.
If the Patrick fight never happened the Lentz/Holtzman line would be flipped, Holtzman stock rose significantly with that win. Maybe Holtzman is getting a bit too much respect for one performance.