Ok ... So, by going the most generic adept build and spending a bunch of karma to get something incredibly noticeable, you can function at starting level efficiency? Maybe we have different definitions of screwed.
To me, outside of roleplaying reasons, you go adept for specialization and useful magical powers. Most of these are negated or even give you penalties for having them. You want a Face? You can go Magician (for manipulation spells, even with background count, it's better) or mundane with some 'ware. You want a Tank? Go super cyber-troll or whatever. You want a gunslinger? Fit in a ton of 'ware that does pretty much everything.
Literally any build you want to go as an adept that is specialized, in my opinion, is going to be worse if you are running in a high background count than their mundane counterparts. Already, the reasons for playing an Adept are low, at least mechanically for me, as 'ware can do so much more early on. Taking away the main strengths of an Adept severely gimps them and really does make it not worth it.
As I think I said, this is all my opinion. And, it is true that background count does affect Adepts, they are at a disadvantage compared to others; it's just running the numbers.
Does this mean the rules are unfair? No, of course not. But I cannot say that Adepts are not screwed over by background counts, just by their very nature.