In the real cost of running a government if any of them truly wanted to disrupt crypto and make people loose faith and money in it till is disappeared there are dozens of cheaper / faster / easier ways to do it then having James Bond sneak into an engineers lab and change chip design to implement a vulnerability that may or may not wind up in a device that people use to secure BTC / crypto.
You're assuming that the objective is to destroy confidence in the network, rather than targeted attacks.
Given that Oracle was literally founded out of a CIA project called "Project Oracle", Facebook was created out of DARPA's LifeLog, and the UK government's Investigatory Powers Act (2016) etc. demands manufacturers to insert backdoors in encryption etc., then I don't think it's particularly schizo to think that they have the ability to secretly insert certain hardware functions in a few key chip manufacturers.
Either way it's the same.
If you want to get to a certain persons
BTC / crypto there are much easier ways to get to a certain person or a small group then to have a chip maker install a back door that you hope they don't find.
A small percentage of people use crypto, a smaller number use hardware wallets, an even smaller number use a wallet with a chip made by manufacturer X.
It's just not worth the effort either way.
Governments have the budget and resources and time to disrupt crypto in general and the same to do a targeted trap for any particular user or small group of users.
-Dave