Usually there's no big deal with fighters getting cut after a bad run in the UFC. They had a chance to prove themselves and they failed. But there's a few guys who had the worst luck in hindsight. I have two examples in mind. Marcus Brimage: He won 3 fights in a row before his luck soured. He ran into a debuting Conor McGregor and got KO'd in the first. After that, he lost a split decision and then won by KO. But next he had to face two more fighters making their debut. An unheralded Cody Garbrandt and Jimmie Rivera. Basically the UFC cut him for losing to two future champions and a top contender. Jake O'Brien: A promising heavyweight prospect who was undefeated. He won his first 3 UFC fights, including a win over Heath Herring. Then he ran into a prime Andrei Arlovski, who TKO'd him in the second round. After that he had to face a young 3-0 Cain Velasquez making his debut. Of course he got crushed. He moved to light heavyweight and won his next fight, but then he ran into this 22 year old kid named Jon Jones. Getting submitted by Jones was enough, he lost his job for losing to 3 MMA greats and future UFC hall of famers. To make matters worse, a year later he got a fight in DREAM and had to fight Mousasi. To this day those are his only 4 losses in his entire career. He won a couple more fights in tiny promotions and then retired at the age of 28. If you think about it, that could've been the career of almost anyone. Who knows how good he really was. He's still only 34, he could arguably be top 5 right now if he'd had better matchmaking. Got any other examples?