Review Detail of dozkiller07 in Batman in MCU

you got a frame work for story but not refined. the fact a 10 year old kid can survive winter Soldier is weird for me. it would have been fine if u have explained how that's possible.i mean we all only know that the kid trained from age of 4 to 10.but thats it we don't know what he achieved through that 6 years and I don't even know how mc looks like. the next problem is he is a smartass too.but I don't know how he become smart.after 10 years of world travel he come back and become batman and build an arsenal of bat man like all batman eqipment like batmobile etc.but I don't know where he got the knowledge.he told us that he make a AI comparable or better than Jarvis but how? a lack of information of how he achieved what he did is the only problem I have. for eg: kid started training (there is not much information of what he trained and specialised in story) then one day kid got traped with monster and somehow killed it.(no idea how he did that.no idea about his mental state in there and no idea how strong he is to take care of that monster, it's just monster died ,end of the arc because mc is mc and mc won't die)