Trade Review Help

I need some help understanding how to perform a trade review after the position has closed. A little background. I've been actively trading since 2012 and have never been able to be consistently profitable. My equity curve has gone down and to the right since 2012 but I have never "blown up" my account. In 2020 something magical happened. I stopped losing money and my account has been going sideways ever since. For whatever reason I can't seem to get over the hump and make a steady profit. I struggle to find out what I am doing wrong (or right). Successful traders mention that trade review is an important step in minimizing mistakes. My problem is that I'm not sure what I am supposed to be looking for when I perform trade review. All I can I really see on the chart is if I made money or lost money. I feel it is impossible to determine "why" a trade did what it did. There is a lot of variability in the markets and it could be just a matter of randomness. It's easy to look at a chart and determine when was the perfect time to enter and exit but hindsight is 20/20 and there is no way you could have known that in the moment. My trading style: I trade stocks mainly on the daily and weekly chart with some intraday. My strategy is primarily support and resistance trading using volume spread analysis. I maintain a trading log that tracks all of my trades. (entry/exit points, R-multiple, dollar profit/loss, date entry/exit, stop loss, initial target, etc) All trades are logged into charting software to show date/time/entries/and exits. What are some best practices successful traders use to perform trade review?