Unit is likely starting very hard causing the capacitor to weaken prematurely in addition to the poor quality of capacitors available these days. I only use Global made in America but they are way more costly than the imports. They sometimes fail early too but not nearly as frequently.

I'd have your ac guy check your starting components (start capacitor and relay) if you have them. If it's a scroll compressor (very likely) the manufactuer (Copeland) says a crankcase heater is needed to eliminate hard starts. Adding a hard start kit is the last thing they like to do.
The biggest what if is the refrigerant charge. Is the unit over charged or under charged and does the refrigerant equalize after shut down. Ive seen units that don't equalize fully after shut down and when the compressor goes to start it really draws some power to get going.
Lastly, is your ac guy actually testing the microfarads of the capacitor or is he just assuming it's bad? Many techs never even check the cap, they just replace it. Ask him to show you what the cap is reading with the meter. It should be plus or minus 5% of the rating.

Good luck.