The jumping is easy to explain, harder to fix now that he's done it for six years! Eye contact is important for dogs, and the smarter they are, the more important they consider it. The bond between human and dog is formed by the release of oxytocin, created during eye contact. Exactly the same process as between baby and parent. If you aren't going to give him the eye contact, he'll try to make it himself.
Now you know why he does it, if you are consistent, he can be persuaded to change. When he jumps, turn your back. But before he jumps, you need to get him sitting every time you can, then give him a small treat and a head massage and look into his eyes. You should be able to start reducing the treats in favor of the massage and the look very quick - collies are quick off the mark. If everyone is consistent with him, it won't take long for him to work out that what he wants, the look into your eyes, comes when he sits quietly, not when he jumps. That look makes him feel happy. It isn't just about bonding, it also makes him feel good - his brain releases endorphins at the same time.
Never shout at a dog. What on earth is the point of barking at him to tell him not to bark?! See my point?
Barking is always a difficult one, especially if one can't hear the bark. There are different sorts of barks, tones if you like, that tell you what he's feeling and that is a clue to the best way to relax him. However, there does appear to be a clue in here - he barks at you when he doesn't get what he wants. That is one of the big tells of a collie that knows who is in control. It's him!
If he thinks that he gets to tell you off, that puts him above you in the pack order. If he's at the top of the pack, then he's constantly in high alert - it is his job to be aware of every noise and movement, and to decide whether it's ok or not. So extra training yes, but actually, very much focused on obedience - things that he must do to please you. He needs to see you step up and take charge - that's everyone in the horse, including children. He should see his place as after humans, all of them.
I've never found collars of any kind work. But I'm not convinced they aren't cruel either since I can't say that I'd be very impressed at having something squirted in my face