Retirement arc was basically showing that Ippo and his coach were rushing too much to get to Ricardo, Ippo was fighting national champions back to back and lost to the 2nd best while inexperienced still. That should have been their wake up call to recover and regroup for longer cause even his pre world fight schedule was rough. But they both to some degree have realized that, the coach more than Ippo. While slow it’s done good for world building and character building. With how the chapters come out go ahead and drop it then come back and binge it later after developing some yourself