They ALL require climbing a steep learning curve. The more expensive programs do a lot of housekeeping for you and may have better "automatic" wire routers. It is best to purchase a program with integrated schematic capture that is backwards-linked to the PCB layout function. All of them are forward-linked: change the schematic, change the board traces. But if you make a production-floor change, substitute a part for example, it is nice to have that propagate backwards to the schematic and to the Bill of Materials.
That said, I have only owned three PCB circuit design tools: PADS (Mentor Graphics), Ivex (now defunct), and now EAGLE. I may obtain KiCAD in the near future because (1) its free and (2) my free trial of EAGLE expired before I could do anything with it. The PADS program was purchased in the 1990s and delivered on 3.5" floppy disks with a dongle. Yuck! I hate dongles. I used it just once, for an entrepreneurial product, and billed the cost to the customer. I didn't like PADS because it replaced the Windows OS with its own OS when it ran. A maintenance subscription was out of the question. Ivex was okay, but the company went out of business and offered a "last chance" purchase of WinDraft, WinBoard, SPICE, etc. with not limits on pins or traces or layers. But no source code, so not a chance of fixing bugs now that Ivex is no longer in business. EAGLE seems to be popular and widely used, but the full-blown version is expensive.
The answer to your question is there is NO best and simple program for PCB design. But I would look at KiCAD and DipTrace before spending any money on commercial software. Check out
this forum link to see what others have to say about KiCAD versus EAGLE. I also downloaded DipTrace last year but haven't used it yet for PCB design. Here is a link to the
EEVblog forum for a discussion of EAGLE versus Dip Trace.