Absolutely true, 2 years is a long time to go without meeting ANYONE in person.
I still think its at odds with the story being told, though. On the one hand, Liz has been a recluse for 2 years, shouting at Moray through the door, lying to her parents on the 'phone, and wallowing in piles of her own garbage 3 feet deep. She hides from people in public like she's in a video game, and her clothes are being chewed by rats; surely if anyone had seen (or smelled) her within that time period, concerns would have been raised? Apparently not?
But also; she's a gremlin who has a reputation for annoying people so consistently that the Head of Security apparently knows her well enough to recognise even when people pronounce her name incorrectly. Being snarky at a presentation 2 years ago isn't really enough to garner someone a notorious reputation like this?
Also her nose has apparently been broken at some point in the last 2 hours. When she was first introduced, it was quite romanesque, and now it has same upturned anime thing that everyone else has.
In summary: The past is an illusion, remembering things that happened is a crime, do not assume anything has to make sense. There are only pastel people and boobies, anything else is irrelevant.