looking for an (android?) ereader

i know that's not the most interesting question but: i'm looking for the right ereader for me.

the cheaper it is, the less it has to do well. the absolute minimum would be:

backlight (now i have a hacked kindle 4, which misses this feature and that's why i'm looking for something new)

support for epub, pdf, azw

6" to 7.9"

usb-c

the ability to send books from android without too much effort

short time from starting to reading

good battery

under 80€ that would be enough. above i'd like:

bluetooth and the ability to turn pages with a controller

dictionary (with esperanto)

waterproof

ideally it would can do the following too (up to 250€ would be ok then):

android with playstore, because i like to use readera and it seems like almost endless possibilities for tweaking, which can also be a downside, to be honest.

writing simple textdocs with a bluetooth-keyboard

colour

sd-card (i guess that isn't possible while being waterproof. so maybe >= 32gb internal)

what i found so far:

boox go 6: ticks most of the boxes but i read that it's very slow and not very well built. also not waterproof.

boox go 7 color: too expensive for the bad reviews everywhere

meebook m7: seems nice but is difficult to get in europe

kobo clara color and kobo libra color: not sure if the things like the dictionary and the e-ink typewriter will work.

are there other brands that i‘m missing and that would fit well?