Not about deserving shots when it comes to title fights in the UFC. I mean Holly Holm was coming off 2 losses and fought for the WFW title against GDR (unranked at WFW TMK), she lost, went back down to win 1 fight at BW, then again gets a shot at WFW title.
We also have Conor McGregor. Despite having 0 top 10 wins, was awarded a title fight against Aldo. Aldo got injured and he fought Mendes, his first top 10 ranked opponent, who had (IIRC) 2 weeks to prepare for the fight. Then after he beats Mendes and Aldo, he gets gifted a shot at LW title without ever defending his FW title. Dana white also said "it would be impossible to deny Conor a WW title fight if he beats Nate at 170" (paraphrased). Nate, being a guy ranked in top 15 at LW and coming to fight at WW with about a week to train.
Of course there are more examples, but these are the latest and "greatest" travesties to the ranking system.