[gherig4]

Look for a new job while pulling in your current paycheck. You were lied to from the start and you owe them nothing. Most of the new places will no have a problem with "job hopping" if you are honest and say you aren't working on what you were hired for. Relevant xkcd https://xkcd.com/1768/

[throwawaysbdi]

Damn that's relevant

[gherig4]

You're getting some really angry and personal responses in this thread telling you to suck it up and clean up the code yourself as if thats the path all programmers have to take. Thats not true at all, many companies provide good opportunities for employees to grow within their role in a more positive manner. Cleaning up the codebase would make you a sucker. They lied to you and as you describe it continuing to work there sounds like career suicide. Don't do them a favor by putting in the extra hours and effort into cleaning up their mess (its not YOUR mess). Your time is valuable! By lying to you they are literally wasting your LIFE. Think about it that way and any guilt/obligations you have towards management goes away.

You make a mistake by taking the job but what is done is done. Now you know what questions to ask in interviews to make sure this never happens again. So, if you are unhappy put in the hours you are paid for and start looking. Thats the only way to get another job and change your situation. When you find an offer you like put in your notice and say thank you for the opportunity and keep it professional. Don't tell your boss that you're going to quit ahead of time, thats a great way to get fired because they wont want to train you anymore.