It makes sense, the older titans were probably nobles that didn’t have to fight much and would only have to face against normal people until the titan war. Reiner was trained at a young age fighting in an era with anti titan technology so yeah he’d be way stronger than shifters of the past. I’m glad someone else respects Reiner
Reiner seemed to dish most of them out and used himself as distractions against other ancient titans. It even took multiple Warhammers to put him down, just says something about Reiner's endurance and toughness.