Nasty stuff, stealer logs. I've written about them and loaded them into Have I Been Pwned (HIBP) before but just as a recap, we're talking about the logs created by malware running on infected machines. You know that game cheat you downloaded? Or that crack for the pirated software product? Or the video of your colleague doing something that sounded crazy but you thought you'd better download and run that executable program showing it just to be sure? That's just a few different ways you end up with malware on your machine that then watches what you're doing and logs it, just like this:

These logs all came from the same person and each time the poor bloke visited a website and logged in, the malware snared the URL, his email address and his password. It's akin to a criminal looking over his shoulder and writing down the credentials for every service he's using, except rather than it being one shoulder-surfing bad guy, it's somewhat larger than that.

Seriously, read the article you posted. YOU probably attempted to log in and the virus on YOUR computer you seem to be in HEAVY denial about captured your info. You're lucky the 2FA probably prevented the people who are are logging activity from your PC from accessing your Steam account.

The article you posted clearly defines stealer logs, and the email you screenshot clearly says your info is in a stealer log breach - I don't know what more to say. You clearly have all the information you need, you just don't want to process it.

YOU LOGGED INTO STEAM ON AN INFECTED COMPUTER AND ARE PROBABLY STILL USING THAT SYSTEM. YOUR COMPUTER HAS A VIRUS.