I appreciate it must be frustrating when a cyclist is ahead of you on a narrow road. Perhaps you're in a rush and need to get somewhere. However...
Sitting on your horn and making patronising wafting gestures while laughing at your own cleverness is not a good look.
When the cyclist then overtakes and is in the bike box in front of you at a red light and sets off at a (perhaps deliberately) slow pace but at a wide junction at which you could easily overtake her, it is perhaps inadvisable to pull up alongside her, and, while still driving across the cross-hatched junction, lean across the passenger seat looking through the side window and not at the road and shout that she's something along the lines of a f***ing bitch and that you hope she is knocked off her bike and killed.
This is particularly not nice when your child is in the passenger seat and looks terrified and more than a little embarrassed at your behaviour.
My only consolation is that, following your appalling behaviour, I followed at a distance as we were going down the same rat run. Watching you nearly take your rear bumper off as you went far too fast over the speed bumps in an attempt to leave me in your wake was quite something and I was perfectly placed to enjoy the view.