That was the season they made Ensign Tilly the First Officer.. lol
Yeah, I was done with Discovery after that. We were in nonsensical territory at that point, and if I couldn't buy into the characters and their motivations, there was no use in watching further. "Power of emotions" aside.
I thought it was such a dumb decision, but I got to admit that I liked Tilly more in the role than I had liked her before. She had been very annoying to me in the first two seasons, but I liked her as first officer as well as her relationship with Saru, It didn't make sense for her to be in the job, but I liked her in it. After that, my teeth don't grate whenever Tilly appears on screen anymore.