You’re asking a lot to the admin of a (free) instance to comply with your needs. Most of the issues you mention disappear if you host you own instance, you can set your own rate limit, control your backups and decide what you accept or not on your instance.
Specifically on the limit for images, lemmy-pictr is my highest ressource consumer, so I can understand why admins of public instance would put limits.
I’m all in for using AI, but I don’t think peoples on Lemmy are interested in a copy of Reddit with only bot content, else they would not be there but on Reddit directly.
Acting as a RSS feed on Lemmy is low quality posting to get my attention, which I would consider spam (especially without the bot tag on the account)
Why not host your own if you’re gonna repost all Reddit posts as your own ?
It’s understandable that if you spam you’ll most likely get banned. If you want to do that, no problem, but do it on your own hardware.
Most non-techie peoples don’t re-publish ~30 posts par days 😉
You’re definitely not the average Lemmy user.
Their server their rules, you don’t like it, build your own or find a community that accept you :)
You want to help other to repost shitpost ? Create an instance and host them to spam the world if you want.