The first one is worse for me, and it lies in Surzhyk, as we call it in Ukraine. When grammar rules, phonetic features, sentence construction structure from two or three different languages are mixed. When the words of one language are pronounced in the manner of another, with intonation, stress, characteristic of another language. It sounds terrible, unnatural, illiterate and disgusting. We have a lot of this in Ukraine, because the Russian language and culture were planted here for centuries, and people forgot their Ukrainian language because of this. I believe that what you mean by Denglisch is closer to Surzhyk, and I can not agree more that thees phenomena must be erased from any language.
Okay, I don't know this for German maybe it's because Ukrainian and Russian are very similar. But interesting story.
Actually, Ukrainian and Russian are not that similar, as it is commonly being thought. Especially by foreigners. They are different by sentence construction, by using Fall (I don`t know how to say it in English, but I mean Nominativ, Genitiv and the others, you have 4 in German, we have 7 in Ukrainian, and there are 6 in Russian), but mostly it is the pronunciation that differs. The "melody" of these two languages vary a lot. And that is what being completely mixed up and abused in Surzhyk. That is why I hate it so much, because it destroys two authentic languages by creating something terribly disgusting and annoying for your ears.