I’m blaming him there I can’t see a problem with the over take or the left turn she gave ample room as she passed and turned left…
She’s indicating left as she’s passing him. Possibly not immediately threatening, or extremely dangerous, as he makes out. But it is stupid and pointless, and potentially dangerous.
How much time has she saved over waiting behind the cyclist. Half a second? A second? Yet by doing what she did, she puts herself in a position where she has increased the number of hazards to be aware of while approaching a junction and simultaneously shortened the amount of time she has to assess them.
Unfortunately, it’s exactly the type of thing that happens all of the time. And whilst I agree with the rest of what you say, the cyclist over-reacts, no doubt. It still doesn’t excuse the piss poor driving.