A player playing the old way (no exploits, no external data sources like Inara etc, no mode switching, no mission stacking) earns far far too little, to the point where its impossible to play the game (whatever data you gather, whatever you manage to learn, be it trade routes or simply how things work, and whatever you buy - modules etc. - all of it can become useless as soon as the new patch comes).
Buying let`s say an anaconda, starting fresh without prior knowledge of the game, is virtually impossible on your own without dedicating your entire life day by day to it
The game tells you almost nothing, and it changes its own rules without letting you know, sometimes in the middle of you doing something or achieving a certain goal, making all your efforts worthless
Its awful. But it`s not only a problem of Elite (but its the most pronounced here because of how slow the game is in general)
The problem comes from:
A player playing the new way, (outside info, exploits, min/maxing cr/h based on data not possible to acquire in game...) who earns far too much, to the point where credits loose their meaning, break any plausibility of the economy and force devs to balance the game around exploits which in turn again hinders normal gameplay