1xL or D: ch or gr ch?

[Officially Retired]

Maybe you shouldn't look for logic. Cause even if they keep it there can two dogs with the same title while one would beat the shit out the other.

There has to be logic in the way things are done, otherwise there (literally) is no rhyme or reason to what is being done.

Maybe the harder to make a champion or grand champion the more people would agree they deserve to keep the title?

It already is hard to earn these titles.
The error in thinking is to assume that because a given dog "lost" that this automatically means he is inferior to a dog that did not lose.

You cannot judge any dog's wins individual so it has to be by numbers.

This is true, there are so many variables that it is impossible to stack wins against the other.
However, if it has to do with numbers, then two things are true: 1) the dog who beats titled opponents with more wins has to be a higher-ranked dog than the one who beats 0-1x winners, and 2) the dog who fights 8x and beats 7 opponents, while losing once, still beat more dogs than a 5xW with no losses ... and, as such, is more of a "Grand Champion" than a 5xW who safely retired.

Might encourage people to continue too if they were to keep the title.

I agree, definitely.

Jack