Look at it and tell me this is normal. I love Plasma but oh man do they need to hire a real designer. Someone with balls to unfuck the interface and move all advanced settings out of GUI into a well documented config file.
The sibling comment, meanwhile, is complaining about extra space devoted to explicit controls for all of the extra options. Well, you can't have it both ways. If you want to have a lot of features and options, you have to either devote some space in the main UI to them, or have a lot of deeply nested menus like that.
Or I guess you could do a config file somewhere, but IMO that's even worse. If we're going to complain about bad UIs, isn't it even worse than some deeply nested menus to need to open a separate file somewhere else with a separate program and learn whatever config file syntax they happen to use.