at levels.fyi Amazon Germany starts at 66.000€ total. L4 at 87000€ with 2/3years of experience. Imagine sending out 400 resumes, spending months on leetcode, multiple days for interviews and then getting an offer for 66.000€. Edit: it's probably still worth it for getting the compoany name in your resume.
Sure, for a graduate position, targeting someone out of Uni; there are not many of those in Germany for €66k outside of FAANG (although I'm sure they exist). And that is unlikely to be what the OP was offered from Amazon (they said "mid-level"; probably SDE-II).