The fact he hasn't progressed as quickly as CR is probably down to the fact he has come through the youth setup rather than for a team that he could realistically be a starter for. There's nothing like minutes but those minutes need to be for teams where the level is right.
It doesn't necessarily have anything to do with talent.
Plus players develop at different paces. Look at the careers of CR and Rooney.
But people here are assuming that he is the same level of talent as Messi and Ronaldo.
And then are making 1000s of strange excuses of why he hasn't shown anything on a senior level yet.
1. first it was Everton, coaches and everything
2. then a bad guy Lucho didn't give him a proper chance in Barca to become a new Messi or Ronaldo
-- and that is all he needed. He "only" needed minutes and he would soon turn into a new Messi or Ronaldo
3. now, already there is an excuse that they played on the wrong/right level in that moment
I have been watching football/reading internet in those days the same as today:
1. Messi performed like a little wizzard in every minute whenever he entered the field
-- for Barca (senior team) and for Argentina NT senior team
-- from the age 17-18 he was trashing all opponents, aka 25-30-35 year old defenders
-- I was extremely happy whenever he was entering the field in the minute 70
-- you just knew that he will bring magic, goals and assists right away, in every single match
-- not only with one-two fancy moves and fancy celebrations, but with constant dribblings, running, workrate, defending, awesome linking up, and he fitted in Barca's senior team like as if he's been playing there for 20 Seasons already
-- there wasn't a single bad step in Messi's senior career since the age 17, and there wasn't a single minute where you could have wondered: "Will he make it or not?"
-- on every single match/in every single minute, he was already showing in every aspect (technical, tactical, mental, motivation, he wasn't arrogant at all) that he will be the greatest one day
Ronaldo?
-- very similar story (except that he is arrogant, and not the greatest of all time, as Messi)
-- he was trashing teams in Portuguese Liga in his first senior Season
-- he trashed Man Utd in that friendly, but not with 1-2 fancy moves
-- he was dribbling past 5 Man. Utd's defenders for virtually 90 minutes, 20-30 times during that match
-- Man. Utd then bought him since they lost Ronaldinho
-- from the day 1 in Man. Utd and from the first minute in Manchester, he was also an awesome player. In every move, touch, you could see that he is special
-- but, he was scoring, assisting, doing crazy dribbles and everything
-- he was only 18 years old
-- and he had no problems at all to show his talent on a senior level (both in Sporting and then in Man. Utd)
-- also, as a 19 year old boy, he was THE LEADER of Portuguese senior NT team, and he led them to the final of Euro 2004
-- again, he was only 19, and look how he already played on a senior level
And then we have a 20,5 year old Deulofeu, who has done virtually nothing in senior club career, not to mention senior NT team.
He is a huge talent, but comparing him with young Messi or young Ronaldo is just incredibly insane.
18 year old Messi benched Guily and Henrik Larsson.
20 year old Deulofeu can't get a place in Barca against guys like Pedro, and against kids like Munir and Sandro.
Deulofeu will probably never make it at Barca.
He will or he will not be a player for some other La Liga side one day, the time will tell.
But he SURELY won't be a new Messi or Ronaldo.