It also seems very difficult to get any contact with lecturers for advice, feedback, support. Even 'personal tutors' (or whatever they are called these days) seem to be unreachable in many instances. I don't think my son has ever met his having been at uni for 4 years.
My son has said the same. Never had any kind of "personal" interaction with any of his lecturers nor his designated "personal tutor". He says none of them would know him if he passed them in a corridor. He's just another faceless student to them. The only time he sees them "in person" are when they're stood at the lecture theatre podium, they walk in, deliver the lecture and walk out again. Some of his lecturers aren't even in the country and deliver their lectures online from wherever they're living abroad.
All he has ever had with his personal tutor was a CC'd email when he started introducing himself to all the students to whom he was their personal tutor, and telling them to email with any problems. That was it. Nothing else in all 3 years. DS didn't even know if he was still there or whether he'd left. Never came across him again.
When he's tried emailing his lecturers for advice, clarifications, etc., it's hit and miss whether he gets an answer at all, or if he gets an email back, it's usually pretty curt and just usually something like "research it yourself" or "did you bother looking at the lecture notes" or some other unhelpful comment. It certainly doesn't encourage DS to engage directly with the lecturers which is presumably what they want!
The seminars/tutorials etc were delivered by random phd students, never lecturers, and usually they didn't know what they were there for, and just made it up as they went along, no pre-session planning notes, no instructions from the lecturers etc., so they just did what they thought would be helpful.
It's easy to understand why students lose the will to go to lectures when there's no reason to be there, i.e. no chance of talking to the lecturer, and it's all recorded anyway.
There's also a lot less of students knowing eachother in their subject groups. DS said that probably a third of his course mates just watched the lectures online and another third were foreign and didn't mix with UK students, so there wasn't much commaraderie between students, and lectures were just cliques of students or lots of "odd ones" spread around the lecture theatre. I don't think he got friendly with anyone on his course at all. He said when it came to exams, there was probably half the exam hall sitting the same exam who he'd never even seen before, let alone talked to.
I do think Uni is more of a lonely place these days unless you're ultra social or ultra sporty. Covid has had a massive detrimental impact, made worse by the way some Unis went over the top with restrictions that weren't required by law and were virtually shut down even between the lockdowns.