No such thing as a build order win in PvP. You win because you are the better player whether it be in metagaming, micro or macro. Ive played/watched countless games with robo players beating pheonix builds, blink stalkers beating immortal busts etc.
Theres nothing really wrong with 4gating, it teaches you clear decision making along with strongly emphasizing early unit control. Both of which are important if you want to improve. My advice would be to either try and improve your 4gate, which is already a strong build or look at doing a 1gate tech opener which Stallion touched on.
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