The bullying word was used at the time regarding Shabaz, but as you say he was annoying and arguably it was everyone holding his behaviour to account, but sometimes not keeping their own behaviour in check as they do so. It would certainly have been treated differently today.
I did rewatch BBUK1-3 and CBB1/2 a couple of years back, but as the main series was just 64 days back then and episodes half an hour long it wasn't too much of a commitment - you could watch a whole week in a night quite easily. It gets trickier with later series with hour long shows seven nights a week for up to 13 weeks, so it's almost three times as much to watch, so I tend to have just watched key episodes from later series.
That's kind of why I went for BB Canada as they're basically 3 x 40 minute episodes a week so you can get through a week in a two hour sitting. And like with Shabaz an incident in the first season which would likely have been treated differently a few seasons later when Tom opened the shower door on Alec to flash him to the live feeders, which on the one hand was a childish bit of revenge but Alec did take it really badly, got quite upset and called him out as a bully in the diary room, and although we saw Tom apologise to Alec very quickly, we saw absolutely no intervention from Big Brother.