Support for the free version of FTB is provided by the FTB community of users. If you purchase the Pro version, then you get a means of contacting the author of FTB directly for support issues, as far as I know.
FTB was written by just one guy. There is no building filled with support staff waiting for every user problem. The author does not have time to answer all the different support issues from people that are getting this product for free.
FTB is a good product which is made available in a free version and a paid-for full version with source code. Yes, sometimes people have problems setting it up, or making it do what they want, but usually any developer worth their salt can work it out.
This forum has hundreds of threads, and it is surprising, or maybe not, how many of them are for the same types of issue. Sometimes people find it easier to ask the same question again and again instead of digging a little deeper themselves and putting together the pieces of the jigsaw. The issues in the forum typically fall into two categories, problems where another user can share their experience and get you up and running, and problems where the FTB tool just can't cope with what you are trying to do. If your problem is in the latter category then your options are limited. You could buy the Pro version and get support from the author, or buy the source code and fix the specific problem yourself, or use another tool.
I don't mean to sound harsh, but it sounds like you are expecting a lot for free!