Why do people want to be Catholic and yet be against what the Catholic Church believes and teaches? These people want to be Catholic but want to be able to pick and choose what parts of the doctrines, dogma and teachings the Catholic Church puts out there. The Catholic Church, in more than one place (including its Catechism) says this is not how it is supposed to work if you are a Catholic.
There is more than one denomination of Christians out there. So many people are into 'shopping' for a religion that fits them, not one they have to fit into. There are many that are more than happy to adjust to the individual. Find one of them if that's your mindset (it's not mine, but I am assuming it's theirs by their own complaint).
I was born and raised Catholic, and at 25 I realized there were so many things I didn't believe in what the church was teaching that not only was I technically a 'bad' Catholic, I was no longer a Catholic. I studied the Bible and different denominations for two years and am now in a conservative Lutheran denomination. I wasn't looking for one that fit my likes and dislikes, I found a denomination that was biblically-based, and consistently applied the bible as issues were presented.
If it ever strays from this, I will find it not hard at all to dismiss myself from it and find another denomination where God's Word is the highest authority and applied properly.