I don't know of any good alternative.
The only Twitter web-viewer I know of that still works is:
-
https://carryfeed.com/However, its UI is not good.
I haven't looked into running my own Nitter instance or creating a shadow account because I don't need to read twitter posts that bad.
My guess is Twitter shadow account (fake, single-use email + VPN) is the simplest alternative for now. Can also delete account and recreate new one with different email/VPN from time to time.