Review Detail of Tha_Vault in The Eternal Soldier Reincarnates

This is written ok, but my biggest problem is the Mc. He’s supposed to be some kind of immortal that was forced to fight for thousands of years, you’d expect his personality to reflect that. but it isn’t, for some reason the mc is somekind of jokestar. The novel started seriously, but 5 chapters later the Mc has turned into someone that makes jokes all the time for no reason at all. The somewhat serious tone of the novel degenerated into another happy-go harem novel. Disappointing