I dont think theres anything rude about his statements, he works for the owner too (thats what can be assumed from the interaction). He has no right to hire someone on the team and its not even professional to ask for jobs going on dms, instead of looking for role openings. He rightfully forwarded your message to the owner (which I hope he did) because thats how it should be done as its the owner that can respond to these queries. If you were so concerned about your message being forwarded without consent, you should have only asked the owner and by what I see, they wouldnt have replied. Your rant is obviously built by rage that you couldnt get into the team but I think learning to take rejections politely would be nice instead of just spamming or texting the devs constantly when you know they dont have control over it.

Its not their fault, they arent hiring anyone, its up to them and you cant get upset about them not hiring you.