Why not recast Jonathan Majors?

I just rewatched Loki season two and it’s fantastic. I thought the multiverse saga was shaping up to be really cool. Kang was a believable BBEG who honestly resonated with me as a villain much more than Robert Downey Jr in a green coat. I get why they fired Majors, but why did they just abandon the whole storyline? Surely another actor could have been found, because variants. I don’t get it.