I should not have to spend 3 days trying to get a font size change in any software.
The argument for this is that font styles, sizes, etc are controlled by your theme. To edit this you need to edit your theme's files (by creating a child theme) so that it can reflect what you want it to look like. You do have control over the font size in each post, but that's per-post, not a site-wide setting. You can even edit the themes template and CSS files form your admin area, so you don't need to learn FTP, although I would highly recommend that you do.
WordPress is not supposed to be a word processor, or spreadsheet or some other desktop software. It's a blogging and CMS system. You will find it very hard to find a blogging/CMS system that gives you more control. If you want an example, try working with Drupal, one of the other most wel-known CMS systems, and changing the same sort of things. It's done in exactly the same way. This is because you are working on a website, not on a document. There's big differences.
What it comes down to is your own personal level of experience. I'm 100% sure that you didn't start up MS Word for the first time and create a full print-ready book, you didn't start Dreamweaver with no prior knowledge and product a complete perfectly built website, and the same goes for WordPress. It's a different system, and things are done in different ways, so you need to be able to handle the fact that yes there is a learning curve.
As far as "hiding" things, I think that's a bit strong. There's plenty of information that's available about how to manage and update themes - the hard part is knowing what you need to look for and that comes from experience (getting back to that point again). The forums are a very good place to ask questions about things like changing font size. If there's something that you want to know you're encouraged to open your own thread and ask your questions. People will try to help where they can. I did notice that you asked about changing font size, but you asked why there wasn't an option ot right-click and change font size. That's something that doesn't work with the current WYSIWYG editors that are available, but if you hightlight the text in the editor window you can change font size and colour with the menus above the editor area. It's unfortunate that no one responded to you there but I think that there was a lot of people that were worried that you'd take their answers the wrong way when they said "doesn't work like that". I hope that you can see a bit of a light at the end of the tunnel and that you'll stick with this.