Canary Wharf is actually easy to get to by road from the East either North or South of the River.Because Canary Wharf is a sod to get to - and from much of Essex you'd need to go into London and back out.
It should never have been built, and it is good to see the City is now the centre of business again (at least pre-COVID). If there's a reduction in need for office space, turn it into flats and pretend it was never built.
Thats why Kingsferry Coaches (now National Express) have been able to compete with rail.
Even the peak coaches are scheduled for 1 hr 4 mins for Bluebell Hill Park Ride to Canary Wharf (and normally arrive in under the hour).
Bluebell Hill Park n ride is situated next to Junction 3 of the M2 half way between Maidstone and the Medway Towns.
Theres even oodles of reasonably priced (by London standards) car parking adjacent to the Jubilee Line in North Greenwich.
Rail wise everybody goes on HS1 to Stratford and then DLR.