you got a lot of things wrong here... The omega's heat was induced by another omega (because our MC was the fated pair to the alpha he was in love with). This other omega convinced an alpha in rut to bite him, and the alpha was looking for his omega like a mad men, and nobody would tell him where he was. The alpha hated society for the whole "it's the omega's fault", and when he found his omega again, he protected him and didn't do anything the omega didn't want. And by the way, from what I read, he wasn't gang raped, he was held down and the alpha in rut was the one that raped him.
for me at least:
the pacing and progression of the story was so unnaturally fast that it made little sense. plus, the issue with the almost(?) rape of his college friends and the other omega was resolved a bit too quick without much deliberation. the ending gave only a small satisfaction, if any.
granted ofc, i didn't fully understand it yet bc it was in spanish.

for everyone who is curious about what happened to the Omega
SPOILER
- the Omega gets raped by a group and in this gang there is this Alpha who bites him
- the Alpha bites this Uke and rapes him because he don't want him to meet his faited pair
- the Omega gets expelled from school because the Alpha is innocent and everyone blame it on his heat
- the Alpha finds again the Uke he ask for his forgiveness and the Omega forgive's him and they live happily together in the end
I personally think this Omega shouldn't have forgive him because the Alpha has participated to the orgy like group sex where the Uke is raped by all those guy's one of them is the main Alpha protagonist of this manga, then after creating this trauma he ask for forgiveness? can the Seme give the chance to the Uke to be together with his faited pair? or using a time machine to cancel the rape part of this life? he can't so the Alpha here really doesn't deserve the Happy life. The gang rape scene really was disturbing, didn't the Seme felt sad when he was raping he's love with others? I mean on other Manga's when the Omega is in heat the Alpha to not bite him or rape him he bites himself on his hand to not create a disaster couldn't this Seme do the same and save this Omega? this Alpha is a real.... (people write what you think) for me this Seme is a trash