Every Sunday night, I create graphics like this in Acorn.
From time to time, people ask me what image editing software I recommend. For years now (not kidding, since 2009) I've used Acorn. Today Acorn 5 was just released and it's being offered at a steep discount to celebrate the launch. If you need a powerful image editing tool that isn't overwhelming to use, I highly recommend Acorn. It's currently just $24.99.