In Chapter 2.3 of the manga Hazure Skill “Gacha” de Tsuihou Sareta Ore wa, Wagamama Osananajimi wo Zetsuen shi Kakusei suru Banno Chi Toss Kill wo Get Shite, Mezase Rakuraku Saikyo Slow Life! , the protagonist Crest realizes the true, powerful nature of his Gacha skill after being banished to a dangerous forest. He starts building his strength and independence by using rare items to defeat monsters while severing his ties with a manipulative past life.
You can read this chapter in Japanese on ComicWalker or look for community-provided options at MangaClash. In Chapter 2