being an assertive jerkBeing a jerk is not a precondition to being an Alpha, it is just a low-brow way to play the mating game. While it works it is crude and unrefined. Kind of what Cutty Sark is to Glenmorangy. While it gets the job done it by no means covers the nuances of refinement, it is an amateur approach at best. If you want to look at an example of what a true Alpha looks like watch a Bond film with Connery. He exemplifies a none wife beater, wearing, Camaro driving Alpha. I mean if you truly break it down is the Camaro, woman beating guy, getting the kind of girl you really want. When one breaks it down past the instant chemical brain pop of hell yes, the answers is no.
Now you don't have to be as swave as Bond but there is something that Connery exhibits well, the kind of guy women want to be around, the kind of guy that is in control, and the kind of guy that can get things done. There is nothing wrong with being this guy, they are really happy people, they don't feel like it is a chore.
The thing to remember is the like beauty the air of being the Alpha is only the ice breaker, it may get you into a 2 month relationship but like all other things it fades, other mental processes take over, things like compatibility become more important, but yes a good deal of women will become dissatisfied if you become a whinny, needy boy (you is meant in general).
The harsh reality though, is that men are more disposable, there are winners and looser and the winner takes all in the mating game. But attractiveness for men is by no means a prerequisite for being a winner.