I have a slightly similar story.
When I retired, I decided I would go back to school. I applied to Ryerson. I was accepted. Some of their courses are done by distance learning, and they used this thing called “Blackboard”.
I'm not 100% sure whether it was inaccessible or if it was just so complicated I couldn't figure out how to use it, but it was a barrier, so I withdrew. I felt I had to withdraw before I even got started, and that was a great disappointment to me. I actually had a reason for wanting to go back to school, and Blackboard at the time was a barrier to me. I think it has been changed a little bit since then, but I don't know if it's accessible now or not.