On the learning new stuff before applying some horrid shit everywhere:

Read the fucking guide/documentation/whatever, few times and if not clear, ffs ask someone - it will make you look less stupid now then later when you fuck it up for everyone!

Dude started doing something new when I was on long holidays, and I got noticed the day I was back.

Said ok, let's dive in and spent all day reading docs and guides, good practices and saw examples of what to apply and what to avoid cause shitstorm will happen etc.

I asked that dude to show me his work on this up until now, and that dude used every antipattern available!

Invest some fucking time in educating yourself a bit and pay attention to, you know, important fucking things from docs/guides!