Dom's saying that because Marcus is distant after Carlos' death (Marcus' best friend) who is also Dom's older brother
Dom's younger so this is the start of their 'brothers to the end' bond we see in the trilogy
If you're gonna trash my homie Dom you better not miss, larper 🤡
This dude once said that he was planning on killing himself as a kid, but then world of warcraft dropped and he changed his mind.
So really I blame Blizzard for all of this.