When force removing Python, everything that depends on Python probably also was removed - and that is a lot. I'm pretty sure it warned you of not doing that... and judging from that first screenshot, you may have wiped your system way more than just removing python...
dpkg --unpack is not sufficient to reinstall a package (there is also "install"...), and the cache in /var will only contain recently downloaded files. There may well be some missing.
You can try to do the dpkg thing correctly, but most likely you will still be missing some dependencies.
As for the last error - it just says that you exited process 1. The operating system cannot continue then, process 1 is supposed to launch everything and not exit. No need to further think about it - rather you need to find a way to get your wireless up and the missing packages installed.
If you really intend to do the chroot recovery, first try to understand what you need to mount where. When done correctly, you may be able to do simply
apt install python to get python back. First try if the recovery function of the installer can set up the chroot for you... once you have the chroot, inspect the damage first before making it worse...
Remember, chroot is not trivial to set up properly: