I cited the case as an illustration, albeit an extreme one, that black cabbies operate under a code of silence and not explicitly as a reason to dislike them. They have always ran a similar campaign of black cabs are safe thus trustworthy, in order to justify the skewed figures reported to TfL[1].
The reasons to dislike them would be the 3x charges compared to their counterparts, knuckle-dragging attitude towards implementing technology and under-handed tactics e.g. insisting on only accepting cash, then never having change from high-denomination notes at the end of your journey, so you are forced to leave it as a hefty tip, ignoring disabled riders, surge pricing after late night public transport has stopped; only accepting rides if they end up in the general direction of their residence at the end of the shift - despite this practice being against their rules, always taking a longer route to rinse the rider and many more..
The reasons to dislike them would be the 3x charges compared to their counterparts, knuckle-dragging attitude towards implementing technology and under-handed tactics e.g. insisting on only accepting cash, then never having change from high-denomination notes at the end of your journey, so you are forced to leave it as a hefty tip, ignoring disabled riders, surge pricing after late night public transport has stopped; only accepting rides if they end up in the general direction of their residence at the end of the shift - despite this practice being against their rules, always taking a longer route to rinse the rider and many more..
[1] https://www.channel4.com/news/factcheck/factcheck-are-black-...