Crazy long working hours. Work/life balance will make you a better human being... but it will also make you a better programmer (https://codewithoutrules.com/2016/11/10/work-life-balance-so...).

Their massive egos. It's you "I know algorithms and wouldn't touch a framework of any kind if kill me" boys and girls. Every second comment thread on this site ends like that.

Javascript. Let it go back to what it's good at, basic web interactivity.

I got my password emailed to me in plain text the other day. So that's still a thing.

Building SPAs when they're not needed.

Interesting question.

I would say - Password only ssh logins; Old / Vuln libs; non tests covered code; XSS and SQL Injection from all the code. - But this is really boring.

AI witch threatens to take over developers occupation - this is more interesting idea for future consideration.

But really I just want to see one thing to be destroyed - idea that creating new tools will solve all the issues (looking at you JS world) instead of improving existing ones or even real deep thinking about the problem beforehand. And then dropping it (new tool) after something new more shiner comes up.

Over-architecting the software. Sometimes a simple problem can be solved with simple scripts.

Complexity

Wordpress and Drupal