Is there a code-free solution which is similar to Selenium? [closed]

I suggest you try Katalon Studio and Cucumber, they are free, easy to use rather than pure Selenium. They are kind of freeware tool (not open source) and have support team so you can ask for help during your test process. Cucumber is gonna have their business version soon while Katalon still remains free for all. I think you should search more info about the two tools and check out the tools to see which is better in your case. Good luck with your test!

If you have ever thought of staying away from recording and playback, and if you get a bit knowledge on ROR, you can go ahead with Cucumber and Capybara to automate the webpages.

ref: https://www.gamesparks.com/blog/automated-testing-with-cucumber-and-capybara/

Despite your negative experience of using Selenium tools, I would recommend looking at other approaches of using Selenium in combination with another tool. For example, in the way that combines the simplicity of Selenium actions and ability of parameterization and integration with other tools. One of such tools is Taurus tool, that is simple in installation, it may execute Selenium actions (in fact you may write scripts as series of Selenium actions or compile jar file with Selenium test and use it in Taurus test) and may be used in Jenkins CI environment. More details of this solution you may find in https://www.blazemeter.com/blog/how-automate-jmeter-and-selenium-testing . And on the top of that you may use jmeter with these tools for load testing, if you need it.