We have to work with the hand we've been dealt. This was not a bad effort; and we've had a few close losses - so wins are not far away.
I agree that it is frustrating to see us penalised for minor infringements, then watch our opponents allowed to do the same thing without even a warning - but it doesn't just happen to us. Some sides get the benefit of the doubt - and we know who they are - while other less glamorous sides cop the brunt of the 50/50 decisions.
When we are back on top, and consistently winning, the penalties will suddenly start to flow our way; and I'll gratefully take every questionable decision that gifts us a win.