Stock Picking : I've big doubts.

Hi everyone, I began stock picking 16 months ago. To be honest, I was an ETF investor. I made my DCA every month and I was kind of happy. Finally, I learnt more and more about stock market. And the idea of ETF was less and less convincing for me : \- Why buying a bag of companies you don't know anything about them ? \- Some companies are very promising and you can beat the index's annual performance in some weeks/months. So I begin and I did what professional advise : diversification. I bet on several sectors : \- IA (semi conductor, network, services) \- Energy (utilities and cooling) \- gold/silver (i bought more to avoid the risk of fail, so some producter and explorater) \- Defense (military and rare earth) I bought maybe 2 stocks per sub sector. And finally, I got around 20 stocks. And my performance ? better than index, but not so better ... In 2025, my nasdaq etf in euro got 4%, and my PF was 20% after change into euro. I notice something : \- When nasdaq gets 1%, my portfolio got 3-4% \- When nasdaq falls 1%, my porfolio falls 3-4% Today, I've just the feeling to get a Nasdaq etf with X4 leverage. what do you think ? thank you.