1) You are way under for the fat intake. If you do not get enough fat you will not get into ketosis period, that is what your body will be using for fuel. And since you didn't have enough fat, that means you compensated the rest of the cals needed to hit BMR with protein. Protein has a 50% turnover rate into glycogen, so its like eating carbs when you have too much. I repeat, you will not reach ketosis this way. Since ketosis is PROTEIN SPARING you do not need to be having that much. Stick around 25 % protein and the rest fat.
2) Now for the workouts. Yes it is hard to do the sets, but you MUST do them if you want to get back into ketosis after the carb up in time for the next carb up. The purpose of the 15, 12, 10, 8, 6, 15 is to burn as much muscle glycogen as you can, which gets you into ketosis fastest. Your not going to be building any muscle from following the CKD so there is no need to go heavy. All your trying to do is retain it.
This is how it should be done:
Ex. Bench Press
150 lbs x 15 reps, then immedietly do a weight you can do to get 12 reps, then immedietly a weight you can do to get 10... all this until you have completed the whole 15, 12, 10, 8, 6, 15 cycle. These are all in a row, no breaks. You can do free weights with this, I do, and so do most. Sometimes I mix a few machines in there, but stick mainly to the free weights, even if it means going down to weights that make you embarresed to be lifting. Trust me, if you push yourself you can do it. Took me a a couple weeks to get used to it. I took the same path you did and it didn't work. I just did my own routine and I didn't reach ketosis until about a day before the carb up, if that. So you see, your going to be wasting a lot of time there, and most likely ALOT of muscle. Stick to how the program is designed EXACTLY, I repeat EXACTLY and you will get great results. If you can not follow this, then you are really just wasting your time.