Most of us hunting our entire lives take for granted having an “eye for game”. We have learned to discern particular shapes or patterns in the landscape from great distances as animals. I’d be willing to bet you were looking right at antelope and just didn’t pick them out. Just need more practice. I stand on top of my truck (when I had a truck) to glass with a tripod. If there is more topography, climb up the nearest hill and glass. If you research what antelope do all day in their habitat, you know where to look for them. They are in particular places relative to water, food, and being shot at from roads. I’d also be willing to wager that you spent 90-95% of your time looking or glassing for antelope where an experienced hunter would know not to waste their time.
Experience is the best teacher. A failure to find a buck is better for you than getting lucky and happening upon one.