Layers can be considered as analogous to transparent overlays that you can keep associated drawing elements on (say the second floor of a building, drawn on the footprint of the first and its foundations, which you can snap to as template dimensions). You're able to switch individual layer visibility on and off, which is like being able to take a transparent overlay out from a physical stack of them, so the objects on that layer aren't seen. You can also lock them, so that they're there in your view or not, but the elements and features on that layer don't attract snaps, they can't be dimensioned and you can't edit or add to the elements on that layer while it's locked. Layers can also be given preset attributes like colour and line thickness (usually called line weight) that will apply to anything you draw on that layer but not on others. Layers have nothing to do with workplanes. Elements on a layer can be on any workplane. You can create template drawings that already have layers and workplanes in them, even when there are no objects in the drawing. Layers are useful in model space and in paper space, workplanes aren't active in paper space at all. Grouping doesn't add layers or workplanes, it has no effect on either of those things. TC does occasionally lose track of objects' workplanes, but it's not an endemic occurrence every time a user creates an object. TC would certainly have disappeared from the marketplace long since if many users experienced what you're complaining about. We can't see how you're using it, so we don't know what you're doing wrong, but we do know that YOU are doing something wrong. Occasionally the program crashes, and it does have the occasional bug, but it doesn't screw things up all the time.
You aren't expected to know anything about CAD when you begin using it, but you are expected to learn from using it. TC behaves consistently most of the time, and there are occasional errors and tribulations, but nothing like the torrent of continual explosions and failure that you report/complain about.
When CAD programs were so expensive that only enterprises could afford them, the CAD vendors used to charge a great deal of money to teach employees how to use it. TC created what's now called "retail" low-cost CAD, the flipside of that is that people who could now afford it were and are unwilling to spend more on education and turned their attention to complaining that the programs are too complicated or "not intuitive enough". Old-timers who started earlier than you either got educated at their employers' expense, and/or attended night school courses at their own and got some certification as well. In those days, the education was usually in AutoCAD and people like us adapted what we'd learned in AutoCAD and other more expensive programs used in work to TC, because CAD programs do mostly similar things but in different ways, and even identical functions often have different names in each. You mightn't like videos, but they're the dominant education medium now and you can watch and repeat endlessly until you have learned something, even from other programs' capacities. Experimentation in TC does no damage and costs you nothing but some time, well-spent if you learn something.
Things like layers, groups, blocks, attributes et al are abilities that can be used to advantage when you've learned to do so, but there are no expectations about what level of education you should have to begin to use the program. If something seems too complicated, and you don't understand it or why you'd want to use it, don't use it.
The Design Director puts access and controls to layers, lighting, groups, categories (another sub-grouping that allows you to switch off the visibility of individual objects instead of the layer that carries them), and of other things all together in one palette. That's less complicated than having to know where all of those things are located to use them otherwise. Palettes are furled to the border and don't obstruct the drawing space until you need them, they can be set to only unfurl when you need them by hovering or clicking on their tab, then they can be pinned open until you dismiss them and they furl up again, like transient toolbars, which the tools palette can be when you learn to use it.