Although FromSoftware's patch notes are unclear however, players were able discern some of the changes made to Radahn just a few minutes after the update 1.03 first came out. In Elden Ring Runes particular, the damage of melee, as well as other attacks were reduced and his hitboxes to connect to attacks were also smaller. This is no longer the case.
There are some distinctive aspects of the Radahn fight, among being the fact that famous warriors from the game's world of fantasy are called to fight alongside you. This allows Radahn to be distracted, allowing players can take on the damage and not immediately be smashed. This also means Radahn is designed to fight an entire team. There are other classic Souls moments, such as when Radahn disappears in the air halfway through the battle and then crashes back to earth a few seconds later, bringing destruction and death.
However, due to the accident-related Nerf, a number of players have beat Radahn, without even realizing that they were given an additional helping hand. "I beat him on my second attempt in the first attempt... I didn't realize he had been being nerfed.. I thought I had luck," wrote one player on the Elden Ring subreddit. "Defeated him in my third attempt. I didn't even know that LOL," wrote another.
A few players thought that Radahn was too easy, particularly on second playthroughs. "40 years from now: gather, grandchildren, and listen to my story about my epic battle against the pre-nerf Radahn, The of the Scourge of the Stars,'" said one player shortly after Elden Ring Runes for sale the nerf was revealed. It's up to them whether or not, all of us can revel in the glory of the Radahn beating, as was evidently intended.