How do we Factor Losses in P4P Rankings?

Some people seem to ignore losses, I think losses count, as they should. People make up excuses for Lomachenko's loss. I think he lost fair and square. He b1tched instead of returning Salido in kind. Being a b1tch won't save you in this pro game. Usyk did tonight something that was much more impressive than what Loma ever did. Completely dominated someone who had a tight grip on the cruiserweight division for a full 6 years. Did the same with the man who beat him. Loma's best win is against someone who beat Rigo's leftovers while having a weight advantage over him. Is there any rationale for having Lomachenko in the top 5 (and even no 1 in some cases) and Usyk not in the top 10 at all?