Perhaps, you are not using make-kpkg which can be found in the debian
package, kernel-package. I think it will help, particularly read its
man page. For a config file, start with the config file that came with
a stock debian kernel that works on your computer. It can be found in
/boot. Edit it to contain just the changes that you know you want. If
that doesn't work, do revert half your changes and see if that
works. Continue, until you find the change that kills your kernel.
Then fix that, or ask for help about fixing it, or why you don't really
want that change.
The above will take time, but the good news is that you know already
that a kernel for your equipment can be make to work.
For starters, you might try constructing a clone of the stock kernel
under a slightly modified name. If this doesn't work, you need to
come back to this list with questions about the use of make-kpkg.
HTH