The difficulty of Super Mario Bros early games

[gugnihr]

I like platformer games a lot and I have played many of them.
I just cannot understand the opinion that most people seem to have about early Super Mario games.
Most people complain about the excessive difficulty of The lost levels (the original japanese Super Mario Bros 2), but in my opinion even the difficulty of Super Mario Bros 1 and Super Mario World is excessive, at least enough to make those two games unenjoyable.
Ok, the main reasons why I don't like Super Mario Woirld is that I think that both the power ups and the graphic quality (the art style) are disappointing in that game expecially compared to Super Mario Bros 3 (the art style was already better in the original NES version, in the All Star version you really can see what I mean)... anyway I was talking about the difficulty, and while there are other reasons too why I'm not a big fan of Super Mario World, as I, as a fan of this genre, think that both in Super Mario Bros 1 and Super Mario World the diculty is a bit too much to make them enjoyable. I mean it makes me just want to quit way too soon. In SMB1 I can enjoy the first world but after that it just makes me want to quit. In Super Mario World even earlier, probably because of the other things I mentioned above too.
What do you think? I mean to me it feels rather strange to see many people complain about The lost levels but not about those two games as well.

[76561198356019466]

I was there when the first NES SMB hit and I despised that game, for seemingly all the reasons everybody else loved it.

I never got the desire to play games that were so dependent on rushing. Not only did I lack the reflexes, which took away the fun, I never understood paying $30-40 for a game in which the goal was to finish as fast as possible.

Can you imagine paying $50+ now for a AAA game, and as soon as you install it's, 'Okay find the portal, good, there's the boss, kill him, game over, and in only three minutes!'

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I liked smb 1, 3 and world. I liked the challenge it gave. I thought 2 was stupid.