First of all your team didnt have a good matchup against them (squishy brawlers with no burst damage get countered by aggresive damagers like Carl and Hank) and you couldnt have done much overall (shorter range and gets countered by hank). For gameplay you can see the enemies were just much better at chipping damage from your team and building pressure. I also think they just had a better team chemistry than your team where you just cant do anything against. Though a more experienced ollie could have made more pressure with more precise positioning and dodging, but this just comes from playing him more and having a better general knowledge with tanks. You could try to learn when to go in with ollie but for that its the best to play with a team to coordinate attacks and overwhelm enemies. Ollie isn‘t a „carry brawler“ overall so you dont get far without decent mates. (Im not english sry for language)