I started trading on RH in 2019. They make investing simple and approachable for someone who like me who knew the basics and just wanted to play around a bit with some spare cash.
But after a couple years when I want to start taking it more seriously, their platform has failed to grow and improve. In the three years I've used them, I can't think of a single new feature they added that I use. Meanwhile, there are plenty of things I'd like. For example, it's beyond ridiculous that price graphs don't have their axes labeled. When selling stock, it's always FIFO, so I can't choose which lots to sell to optimize tax liabilities.
The problem is that I have a hard time leaving because their margin rates (~3%) are so damn good compared to the major players (8% or higher).