There's something I noticed and it kinda makes the story doesn't feel natural is how the events and time stops when the MC is training or sleeping for example in the previous chapters he trained for 20 years and no big events happened during those 20 years only after he finished that the Major events started to take place then again here. He slept for a month and only after he woke up and finished his searching and started moving the sea tribe decided to look for him again like come on haha