I totally get where you’re coming from. In smaller non-denominational Church’s I’ve attended and from talking with my friends who are members of these churches, there is a greater sense of belonging and family that is shown.
In many of our larger parishes you sometimes feel like just another face in the crowd. The priest is probably so busy with other demands on his time, everything else is left to the parish staff to handle.
I can’t tell you how many times, I’ve sought out the help of a particular person who was placed in charge of a certain function at Church, then to be met with “you must be a member here?” Or “I’ve never seen you before, did you just start attending?” It’s a sad feeling when you’ve been going to that parish for years.
I think in many cases, the parishes are simply too large and the dioceses so vast that people don’t feel part of the Church. This could also be why so many leave.