Unnecessary complexity, completely arbitrary one off designs, over emphasis on one part of the behavior while ignoring others. Using design patterns where they shouldn't be used, code once and forget operations exist, using languages and framework that are familiar but unfit for that purpose. The list goes on and I see it happen all the time, AI only makes it worse because it tend to verify all of these with "You're absolutely correct!".
Good luck maintaining that.
this can only happen in a shitty places with incompetent team
Every team has incompetence at some level. If every team was perfect, there would be no more work left to do, because they would always get the right product built correctly the first time. No bug fix releases, no feature refreshes, no version 2.
Beware, your ego may steer you astray.
been hacking 31 years with the same ego but you never know. and if I learned anything in these years is to get out the heck out of any place that treats people not by their skills but by how long ago their Mom gave them birth