1996 Toyota Camry New breaks goes soft to the floor

Brakes problem
1996 Toyota Camry Automatic 77,000 miles

Toyota Camry 96, 77k, 2nd owner. Just did 60k service, changed breaks, pads, shoes, rotars, timing belt, axles, fluids, etc - paid $1,450. Immediately noticed something wrong with the breaks - it was giving in halfway. Took it back to the repairman twice who said there was nothing wrong with it. I thought I needed to get used to my "new breaks." I drove two months in frustration. Yesterday morning, my breaks gave in all the way to the floor, very soft, and I almost hit my co-workers' cars. Last night, I could not drive it back home. My husband and I took it to the same repair again this morning: Another person checks it and he immediately identifies saying that "it is very bad, paddle very soft, goes to the floor." He checked it and called us back: Master Cylinder, break fluids - another $225. Here's my question: How come this guy tells me what's wrong the minute he hits the break, and the other guy says there was nothing wrong with it? How come bad breaks were great when car went to repair, and the minute I have new breaks, my master cylinder goes bad. Does this guy know what he's talking about, or am I being fooled around again. Is it his bad break job which caused the "said" additional damage? Could it have been avoided? I am so frustrated with all this ordeal, let alone the time I had to take off from work on several occasions to follow up on these breaks. Any advice would be greatly appreciated.