Really? Rainey's never beaten anyone. Holloway, since the Conor fight has beaten up Andre Fili, who's immensely talented, and has a win over Leonard Garcia, who might be a bit wild, but is MUCH better than Rainey. As for Brimage, Conor made him look incredibly average, but he has solid wins over Jimy Hettes, Maximo Blanco, and Kyle Bradley. 3 guys WAY better than Ricky Rainey. McGregor might have the UFC hype machine working in overdrive, but to compare his record to Michael Page's record is laughable to say the least.
I rate Page incredibly highly, think he has a massive future, but one major reason he doesn't have a major hype machine behind him is due to his awful level of competition so far. He's being built up like a Boxer. He's being fed cans to help build up his record. Until he fights anyone remotely decent, with good wrestling, I can't believe the hype.
I think you're not able to look at these fighters in a truly objective way, possibly because of UFC bias?
I'm not usually a fan of MMA math, but ok let's play!
Max Holloway has a split decision over Leonard Garcia, now Garcia is a fun fighter but he's 18-11 (6-9 since 2009) and his most notable wins were split decisions over Nam Phan and Korean Zombie (KZ later avenged this loss), Leonard Garcia whilst a good regional level fighter who puts on exciting fights has never really looked like a fighter who would be able to go to that next level - he lost 5 consecutive UFC fights before finally being cut.
Max Holloway has a 3rd round submission over Andre Fili, like you i believe Fili has potential to do some decent things in MMA however to this point he doesn't really have any notable wins, so it's hard to gauge truly where he is at at this point, for us to claim he is anything more than UFC fodder could be hasty.
I think as of right now, it would be hard to say Max Holloway is significantly better than Ricky Rainey.
Similarly Brimage has a couple of decent wins over decent opponents; decisions over Hettes and Maximo Blanco (split), Hettes has a win over Nam Phan (decision).
For me to say that the difference in quality between Max Holloway, Marcus Brimage and Ricky Rainey is negligable - really isn't laughable, it's the logical conclusion a sensible person would come to when you review their records and the records of their opponents.