I put aside my love for Ino (werewolf lover) ... I don't think Razel is the right person for Lee. From what I managed to understand (I don't speak English) Lee wanted a family, a person next to him who felt the same need not to be alone forever, that's why he created his children. Lee is also a man of science so he "enjoyed" observing the sentimental and non-sentimental developments of his children by giving the Crusade mission to Razel; on the contrary Razel just wanted Lee for him, he was an almost obsessed sick love that aimed to monopolize Lee. Razel believed that killing his desertering children (but he actually enjoyed himself) would make Lee love him even more, but the opposite happened. Lee saw that Razel didn't share the same dream and left him ... (PS: I respect your vision, it's not to attack a fight XD)
I just think at first they both (Lee and Razel) loved each other, Lee thought he found the right person to build his family with so he made Razel a bersek but eventually Razel became jealous of the love Lee poured out to his children ... probably Lee has his faults for the end of their story but I don't think it justifies Razel's behavior, I agree with you that they didn't know how to communicate with each other :-(
And your welcome^v^♡
I think they are referring to a chapter in which Lee calls Ino "husband" seeing him full of bruises and beating but yes, Lee made Razel a bersek for love but in Gok's time he is, unofficially, married to Ino. (Even I didn't quite understand why I saw spoilers and in a scene that will come later Lee gets the bouquet of the "bride" and everyone look at him like "WTF" lmaoo XD)

Im so frustrated with myself. Im the type of person who like enternal love . My heart is aching not becuase of the two main love stories. But because of Razel and the father of Vampire story khaki? Huhuhu.
I want them to be happy. I mean its obvious they love each other so much but to think they dont communicate well and Ino is on the picture too. Dont get me wrong he was a good good wolf but I still prefer First loves. .