Checking out your Insights should help you improve a lot!
https://www.chess.com/news/view/chesscom-releases-new-insights-feature#weaknesses
I'm not sure if gives you info regarding your weakest openings though. You might wanna check.
How do I review my openings?
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When I analyze a game, it will often say something like "you've played this opening x number of times and you have a 45% win rate."
How do I review my 10 most common openings and then see which one I'm worst at? I figure if I can improve my worst openings, I should get better overall.