You'll see that type of output from most WYSYWIG editors. Some are better than others and they've improved over time, but a lot are still garbage. Both Redactor

You'll see that type of output from most WYSYWIG editors. Some are better than others and they've improved over time, but a lot are still garbage. Both Redactor and TinyMCE would have produced something like this at points in the past (been a while since I used them, so that may not be the case now). Pasting from MS Word will also produce some gnarly HTML in most editors.