I'm having the same issue - Played and finished the campaign countless times across my lifetime, never had a particular issue with geonosis. Feels to me like something has changed in this latest digital version of the game. No matter what strategy I employ, what order I attack and defend objectives, how soon I destroy the trade federation ships, I always lose on tickets, sometimes by a huge amount. My strongest theory is that the droidekas are too numerous and overpowered, they chew through units when their shield is up and there are always at least six spawned at one time. If I focus killing them in the gunship I lose by less, but then we're not capping fast enough. The friendly AI also struggle to actually get up into the cap zone for the two bunker objectives, often requiring you to do it yourself, meaning you get out of your vehicle and its lost to you. Literally out of ideas at this point. Anyone else?