People who write/draw self-insert stuff are absolutely adorable and great and do not ever deserve to be shamed for that. I mean. Go and write a fic about your fave character falling in love with you. You’re amazing.
The thing that’s honestly hilarious about aggressive and moralistic anti shipping movements is that it literally does not matter at all.
Nobody outside of a very niche bubble and a small number of people even remotely gives a shit. They pour all this time and energy into something that absolutely nobody in the real world outside of the Internet gives a flying fuck about. It would be sad if it wasn’t so funny.