Also sometimes the best cure is more practice. You need to replace one set of habits with another. Start small. Like how to do a flavor of integration testin

Also sometimes the best cure is more practice. You need to replace one set of habits with another. Start small. Like how to do a flavor of integration testing. Perhaps take some online courses? There is also a huge amount of YT vids out there. One thing you may need to do is go back to the basics. Also make a task of it. Have a set time where you for 1 hour a day 'learn new coding skills'. Such as refactoring, code style and when and why to us it. Also find a project that you are interested in and follow it. I learn quite a bit doing this I have a dozen or so I follow and watch the pull requests to see interesting uses of code and style, even if I disagree with them. I do not contribute to them but I follow the style and commits they do. You can learn a lot by doing your own code reviews of other peoples code. Seeing how other do it and work on that.