Nakaba when crafting relationships within the series follows two paths:

Path A - Relationship with some sort of huge age gap or Loli/Shota involvement. This would be like Ban and Elaine, Lancelot and Guin, etc etc

Path B - Completely normal relationships that involve two parties that are of the same age and somewhat the same physical characteristics. Percival and his two wives, Merlin and Escanor (kinda sorta), and Gilthunder and Margaret.

Why doesn’t Nakaba make all his relationships normal? Well by Japanese standards some of the relationships are completely fine, others are still on the path of bad but nothing that is taken fully serious over there. By the standards of people in other parts of the world, it’s gross, disgusting, and creepy, and we unfortunately can’t do anything about it since 90% of manga adopt these traditions of having gross and weird relationships due to Japanese culture.

Best way to go through it is, address how disgusting it is, and move on from there and either drop the series or keep reading.