High school custodian implies coworker is 'irresponsible.' AITA?

"AITA for implying my coworker was irresponsible?"

Some background: I (35F) work as a night shift custodian at my local high school. Most of my coworkers are actually pretty cool, except for one. This one dude, we'll call him Bill (25M) is constantly glued to his phone which he keeps the volume turned up without headphones, even when he's working.

Bill cuts corners, lies about work he's done, rants about politics to anyone too polite to tell him to go away, and is completely unaware of his surroundings due to his face always be glued to his phone. The kids were out for school, so we all took advantage and did some deep cleaning of the school while there were no kids

Another coworker had just mopped the cafeteria with a product that works like floor wax in that you have to let it dry before you can walk on it. Bill was walking around the school with his face in his phone and walked right across it while it was wet, leaving footprints and causing other coworker to have to go over it again quickly before it dried with footprints in it. That's just one example of the piece of work he is.

Another piece of background, he and his sister (let's call her Carol 22F) live with their dad. She's 22 and works harder than he does. Info: One of our roommates is moving out in February so we have a room opening up. I asked Carol if she wanted to move in with us and she turned it down, stating that she can't because she helps their dad with the bills and keeping the house running because her brother won't.

Her words. Knowing all this and my own personal experience with Bill, I already have a little resentment because Carol is a sweetheart and I hate that she's in that position. Anyway, onto the story. So we were all on rest and Carol makes some comment about some responsibility she has that week (I don't remember what. I think it had something to do with laundry.)

Then Bill made some comment about her doing her house jobs or something, I don't remember exactly. I only remember that I couldn't stop myself from saying something this time. Before I could talk myself out of it, I blurted out to him, "Why is your 22-year-old sister more responsible than you?" His response? "Because I was never told how to do anything. I was told just to figure it out."

That comment only made me resent him more because that just sounds like an excuse. Like, then why the hells didn't you ever figure out how to do anything? He lives with his dad and sister and basically lets them do everything for him. What does he do with his time and money?

Video games, gambling, and binging the news on the very phone he's constantly glued to. I meant what I said and it did feel good at the time, but I'm still regretting it because 1) I learned more about who he is that I didn't want to know and 2) I still have to work with this dude and I don't want this to affect how we work together. I'm starting to think I should have kept my mouth shut. So I'm wondering AITA?

Here's what people had to say to OP:

fIumpf said:

You have got to let the personal stuff go. I’m leaning with a slight YTA. If Bill isn’t doing his job properly and his stuff affects others, like the footprint thing, you need to bring it up with your boss. The interpersonal family stuff and what Bill does with his free time and money is really none of your business and is clearly impacting your work/life balance.

YearlyDepression said:

I am solely judging the comment you made, not the greater situation: ESH. Bill sounds like a terrible coworker and possibly a terrible brother. But your comment didn’t help anything. It didn’t help Carol, it didn’t change Bill — it was completely unnecessary and will only make your working relationship worse.

I’m not saying you should apologize — that would just bring more attention to it. But moving forward, I would avoid personal remarks and insults. If he continues with his lazy behavior, he hopefully won’t be your coworker for too much longer.

Loose-Mousse1064 said:

NTA. He probably didn't think about it again after that. Sounds like he is completely wrapped up in his own head space.

bahiyyihh said:

From my point of view, even if Bill is a lazy brother and an irresponsible son, that has nothing to do with the workplace. I understand your frustration, and you are allowed to not like him as a person, but you just strained the situation in your work over something you are just not entitled to be a part of, which is his personal life.

However, if he keeps his lazy behaviour at work and interferes with your or your co-workers obligations, you should talk to your boss about it because it directly affects you.