Contains spoiler (basically summary of chap 40) Yeah I understand basic and common Korean words. Though I don't read everything since I read it per syllable to understand but it's tiring. I just read the obvious words and based on the art as well. SPOILERRR.....
Actually, you can't blame Alex about everything. I guess he invited DG over but he has a broadcast so he ask him to wait. The wine was maybe sent by a fan and I think he allowed him to drink it. DG got drunk then went to his broadcast room and tried to suck him off when Alex is still live. So he was caught off guard. He told the viewers to wait for a moment coz DG is doing something crazy really but DG even went up and showed his self to the camera and said that he's BJ Alex's lover and was about to tell his full name good thing Alex cut him and the broadcast. So off Alex got mad and throw the mask at DG. Then ask him to leave and go home. But DG exploded and all, said the ILY words and mentioned the guy in the picture that's why Alex got even more mad.

Honestly, they're too toxic for each other right now. Better if they parts ways and just like how every usual love story, Alex would only realize DG's worth after he's gone. DG even said the words "I love you" already. But it can't be helped, Alex is emotionally unstable and still not over his ex. I got excited over MD and Chanwoo though. A breath of fresh air!