Compared to English: yes, definitely. English doesn’t really have case markings outside of pronouns, nor adjectival declensions, not even grammatical gender.

Compared to Mandarin: probably German is easier, I agree on that.

Compared to Japanese: I don’t know enough about Japanese to know for sure, but by the standards by which it has “three writing systems”, the Latin (and Cyrillic and Greek) alphabet also has two (uppercase and lowercase). :P