I've seen plenty of Beta's from the inside and there is no shame in what you have said. In fact it's good of you to give any feed back and I'm sure the data logged while you did take part will help. The same goes to those who just 'play' in the beta, you're actions are logged and help give data that is invaluable I.E. Server stress testing, load balancing etc.
The move to paid beta testing has been done by many companies not as a cash grab (although it seems as such to many) but to give players early access as well as get some good test feed back. A lot of the players will just play the game and rush towards a perceived end game, this is good as the people who test everything in-depth and send War and Peace like reports (Very welcome BTW) tend to concentrate on testing the new features to death.
Software is such a large and complex beast these days that QA departments try but always fail to find every bug (Sorry QA but I've rarely seen ISO standards maintained or even achieved or just plain ignored) and I've even seen QA people blame beta testers for not spotting a bug, which is about as stupid a comment as a QA person could make!
On a personal note I am not taking part in the beta due to other obligations but from what I am seeing Frontier have done an exceptional job so far, I can only wonder at what the coming season will bring!?!
TL;DR Just keep playing the beta or don't. If you do, make reports or don't. The choice is your's!