Rhode didn't think that he lost much even after transmigrating to this world. Other than his inventory and swordsmanship skills, he somehow managed to salvage the rest such as his memories and the holy card deck which was now mostly a memento.
Rhode couldn't retain his swordsmanship because he lost the prerequisite stats to use them. However, he felt that it was fine because he knew how to obtain them back. Some were learned through accumulating reputation points, some were found in ancient ruins, and some rarer skills even needed to fulfill certain conditions before he could learn them. But after adventuring for several years in the game, he could pinpoint the location and requirements of most swordsmanship skills.