It doesn't matter if your W sees him as alpha. Its you trying to find logic in her choice. Her choice might never make sense to you. She's most likely not thinking logically. Sometimes a WW likes to deal with a man that is totally opposite of their H. In their mind going opposite will get them away for the type of man that has caused her so much pain.
Its not about alpha or beta. Its about you making a choice to become a man only a fool would leave. And if you are an alpha, when does an alpha ask questions, questioning another mans qualities? Be strong! Be confident! Stop comparing yourself to the OM. It will only drive you crazy. She chose him for her reasons and none Of them was to please you are get your approval ( I'm saying because it her decision, and she might never be able to tell you why).
Stop giving the OM head space so you can heal. The faster you are not worrying about him, the stronger you will look to your W.
Onward and forward
M:37 W:37 T:11 M:10 S17, S13, S10, S4 BD:06/28/17 OM confirmed 07/20/17 Recon the M 10/29/17 Working hard:2gether
Onward and forward
This process is not a sprint it's a marathon! Patience, Patience, Patience.