You can do 2 things - install a custom rom or de-enshittyify

From what i got from checking - there is not any rom already present, you can try to make one yourself, but that is a hard process

to de-enshittyify - you can start with UAD https://github.com/Universal-Debloater-Alliance/universal-android-debloater-next-generation.

• first boot into phone (and dont connect to internet) and enable dev mode

• then connect to desktop and open UAD, and it will give a long list apps which you can consider from removal (with deifferent degrees of recommendations)

• you may also disable remove google play services at your risk (google apps, and banking stuff would not work, but better battery life and privacy)

• after doing this, also remove any xaomi skin apps (can be done with UAD, in case it does not find anything, check the unknown section too) (phone, sms, message, …) these are usually forked from aosp, but with added “features”

• replace these apps with fdroid equivalent (a good family of apps is fossify https://www.fossify.org/, and also use newpipe)

I am a bit experienced, so I can do it all in 1.5 hours, if you have not done this before, maybe 2-3 hours, and you will have a clean phone, largely devoid of closed source apps

Sorry, I don’t have any advice or anything, but can you please mark the post nsfw (though there isn’t much explicit stuff, but still)

a fun fact: for the most efficient mass energy conversion, you need a huge spin black hole (preferably naked). Then you can get about 42% conversion. (there was a minute physics video about it i think)

i know, but i in my right mind can’t give any money to google

i don’t even need good specs or sd card, just a good camera, foss rom and good battery

yes, but that is a separate investment

the battery thing is real. I basically can not find a laptop with weak/low power cpu and igpu, but a huge battery. I get that we can not do more than 99whr, but for weak stuff, I can not find anything above 50 practically.

epubs are effectively self contained html files, but the scripting is not there (afaik)

to add to it, you “can” add anything arbitrary, but it is not same as downloading a executable. Due to some really weird reasons, many parties were interested in using pdfs like interactive forms, for example some government forms, where you can fill a field, and you can add scripting to execute upon input and convey back. It is somewhat like javascript for pdfs, and then the onus is on the pdf readers to be compliant enough to execute such scripts, and provide enough access to your system. Many minimal pdf viewers do not implement these features, or for example pdf viewer in firefox has the option to execute, but disabled by default.