So many things
Why is this a problem? Surely they just need to add a disclaimer - 'Are you a bad guy then you can't use this backdoor we had put in, by order of the Government' Of course all the bad guys will take notice and stop accessing the data.
You have nothing to fear if you have nothing to hide. This is generally a known problem for authoritarian regimes, but take the super democratic USA. We have a backdoor and can access all your data. (As a purely hypothetical example). We trust Briden and he doesn't abuse the access, and won't allow anyone else in the government to do so. That is great < Time Passes > Trumpy is the new President and now has access to all your data along with his mate Nylon Muse. They set up 2 new departments - DOGE (Dept of Government Efficiency) and DOGR (Dept of Getting Revenge).
You sent a message supporting Briden and his replacement Parris, don't worry Trumpy and Muse aren't at all childish or thin skinned. Wait,why is there 50 people all wearing black assault gear outside the house? Why is that big tank driving over the garden towards the house?
Just remember you have nothing to fear as you were only using your 1st Amendment rights, honest. The Supreme Court will of course back you up, well maybe, if you voted Republican in the last election and were found guilty of storming the Capital
Don't forget Trump can do anything he wants and it isn't illegal if it is done as President, so that won't be a problem when you consider that if his lips are moving he is lying.
Hoping I don't need to include Sarcasm marks above