A password like I8Lik#PuDD!ng8§ is not secure? You have got to be kidding. Steve Gibson's calculator at
https://www.grc.com/%5Chaystack.htm gives the time to exhaustively search this password's space assuming one hundred billion guesses per second at 1.49 billion centuries.
How is a password like this not secure?
It's not secure because modern password crackers assume your password will be a series of words, and try "31337 speak" combinations such as substituting 3 for e, adding a few random characters on the end, etc. This approach is much faster and can crack such a password in days or even hours.