
This is still so early so i couldn't say the alpha is bad, his actions so far are quite ... reasonable considering his personality and what's the omega hiding from him. Hiding they're mated is one thing, but hiding a freakin' child is different story even when the omega absolutely want nothing from the alpha.

It's sure unreasonable from normal people pov, but the alpha is someone with twisted mind so him rape the omega pretty much expected anyway because that's the fastest way for him to make the omega subdues. I'm not blaming the omega for hiding himself and his child, that's his right, but the alpha also has right for not happy with what the omega's doing. It's between them and both has their own faults.
"I might be your only omega but you're not my only alpha"
This sentence along with seme's expression really make me laugh, that bastard deserve it. Love how uke managed to give seme some hurtful shit despite being hopeless romantic for him.