I'll add one more annoying part: testing the CI/CD script on gitlab. It doesn't exist, and it's hell.

Edit: perhaps it's skill issue too, but I'm annoyed they don't have a similar feature to jump to definitions as github does.

Did you give https://gitlab.com/RadianDevCore/tools/gcil a try yet? The developer has been a pretty long record of maintaining the project and it allows you to get some level of debugging locally before pushing.