Your explanation assumes that scope and scale are part of the definition which it is not.

If you keep zooming in or zooming out the definition of E2E keeps changing under your statement.

If the only knowledge a system has is between a sender and a receiver (Which satisfies even your definition of “intended recipient”) then TLS is E2E encrypted.

Do they strictly define end to end encryption in this bill?

If not, then yes, TLS is “end to end” as the sender encrypts the message, and the receiver decrypts it. Each “end” to each “end” is encrypted, satisfying the semantics of the term.

So literally everyone in the UK using any website that uses TLS is now a hostile actor?

Essentially everyone’s a criminal which is a huge boon for the government. They can now get rid of anyone they want at any time, legally.