I've traveled all over the USA and I don't think any of the above would match my expectations before setting out. It seems like she already had her mind set on looking for the negatives.
Crumbling mouldy stations. Buses that were four hours late with no announcement, and staff that literally laughed and said "it's Greyhound" when asked how late the bus would be. Weird invasive disempowering things, like bag checks because someone was seen flicking a knife shut in the station, or getting kicked out of the station to wait. Every other passenger was hostile at needing to run the Greyhound gauntlet, with the exception of the meth addict from Arizona who was absolutely lovely and had a nice chat with me, and I couldn't blame them for it.
It's hard to describe because it sounds like the kind of problems that apply to any bus system. They are, but for some reason they happen every trip with Greyhound, and they're all dialled up to 11. Anyone who's ridden one has the most godawful stories about it.
Other than the vast herds in central california, moved from Corona california (due to climate), I've never thought "hey I might run into..." any of these things.
If you go from Seattle to Minneapolis, you don't see any of this, afaik.