5 month old puppy suffers from extreme frustration

Hey everyone. First time posting here Today I Had a huge mental breakdown because of my 5 month old puppy (malinois) Before you come to attack me, I did do a lot of research before getting him and I know they’re a lot of work but god I never could’ve prepared myself for this kind of crazy. He’s a good dog,but gets so easily frustrated I’m so tired of it .. when I put him in my car in the backseat he will bark non stop and will try to get to me,he already bit me twice in the back because of how frustrated it gets him. Then when guests come over he wants to jump,bite at them and when I put a leash on him to manage him he will bark and go even crazier Also reactive to dogs because he can’t reach them but if he does say hi to a dog,he doesn’t know boundaries and tries to get on top of them I want to socialise him well with dogs but I never really meet dogs that can nicely correct him and tell him off I did try some trainers but I did not like the way they worked. Of course I will keep looking but just wanted to vent/ advice and if maybe someone is also going through this