Responses
From the point of view of the Alfa it makes sense that the manhwa is called you are my world, literally, I also find the omega immature but I get that frustration that he has against the Alfa because he can’t do certain things without, for example, the pheromones of the top, that’s the world of omegaverse :(

uke does have reasons for disliking the seme like how seme covered him in pheromones without consent...i just don't know how they're going to end up together bcs on ukes side, he doesn't seem to LIKE seme...it's kind of ridiculous to hate seme for being an alpha. i understand uke had a bad experience with his family celebrating or whatever him being an omega but u said u wanted to protect seme? and it is a childish mentality bcs you were a child!!!! but as you're older??? to just treat seme terribly because he loves you and cares about you (esp bcs u r his childhood friend) is just so stupid idc seme needs to distance himself from uke and give uke time to THINK like do u want seme in ur life or is ur childish mentality still there?
yeah u could say he has that mentality too bcs he's an omega but hello as a woc i understand???? but it gets to a point. seems like the author just wants to push him as a tsundere but it's annoying more than anything
and seme is such a fool omg he really needs to get some hobbies. if uke is annoyed he's valid for that bcs u need to stop following him everywhere and let uke yearn for u!!!! by being normal!!!