Unethical policy of ETS's ScoreSelect option
I don't think there are any "solutions".  If the university wants to ask for all scores, even the ones you wanted to block, then they can ask that.  If you want to apply there, you don't have much choice but to answer honestly.  Omitting material facts from an application is a pretty serious academic offense; even if they don't notice it at first, it can still get you kicked out of the program if it's discovered years later.  Photoshopping the Score Report to erase the undesired scores would make that offense even more severe - now it's obvious fraud and falsification.

(It wouldn't really help even if ETS offered you the option to omit scores from your personal Score Report, since the university could demand that you submit the full version with nothing omitted.)

I agree that it seems a bit shady on ETS's part to suggest that this feature can really prevent universities from finding those scores, when in fact the university can still demand that you share them, and it's unfortunate that this led you to choose a less appropriate test-taking strategy.  But none of that really has any bearing on your applications at this point.  You could complain to ETS or sue them for false advertising or whatever, but that seems outside the scope of this site.

If it's any consolation, my impression is that universities are more likely to pay attention to recent scores, unless it's clear that you've taken the test a zillion times in hopes of randomly scoring well.  So the older, lower scores may not hurt your application very much.