[samizdis]

You like development work and you are willing to learn and to put in the hours. Putting into practice what you have learnt in real-life situations is always going to throw a few spanners in your way that you can't possibly avoid without prior experience. Don't worry about it. It's not you, it's life. Don't beat yourself up about it.

Try learning through socialising, too. Reach out socially to rookies with whom you can share tales of woe - and maybe laugh together about them, and congratulate each other on the experience gained from them - and reach out to experienced devs who are willing to mentor rather than criticise you for understandable mistakes that they've probably forgotten they used to make themselves.

I truly doubt that you are incompetent, and I know for sure that you are not incompotent, and I really hope that you don't mind a bit of wry humour ;-)

Best wishes on your path to confidence and success.