How to make a actually good and unique username

[Howard the duck]

I am finding it impossible so far and exhausting.

[Maria]

A good solution I came up with for myself:
Go over to any nickname generator website, generate 2 nicknames and combine them in one whatever you see fit to your liking.

[DarkCrystalMethod]

Random verb + random pronoun + some random biological part or feature.

[abcd]

steal it from someone more creative than you are.