That's an entirely generational and social thing and it's not so much caused by a dislike of the English language but by a lack of opportunity to actually speak

That's an entirely generational and social thing and it's not so much caused by a dislike of the English language but by a lack of opportunity to actually speak English with Germany being a large domestic market itself and things like every film being dubbed in German. If you live in one of the large cities (particular one of those that are used to welcoming tourists) and mostly deal with young people from the tech industry you'll be able to get along without ever having to speak a word of German. Signage - particularly in small towns that are not used to foreigners - will be in German exclusively but to understand those a little bit of tourist German will be sufficient. That said, what's so bad about learning another language? It'll broaden your mind and teach you a thing or two about another culture. Besides, learning German isn't all that difficult for a native English speaker (perfecting it probably takes a very long time but nobody will expect you to be perfect).