Now when he's omega I lost interest cause now MLs feelings will feel like instinct towards...

ikr like him staying as a beta while ml hates betas would be a much better plot than a runaway pregnant omega

The ML doesn’t hate betas. It’s been brought up a lot but it will be brought up later again.

now that would make the plot even more interesting if mc stayed as a beta and then gets a reveal of this misconception imo

So write it.