Yep, used to take me an hour on a bad day (whilst working for the previous employer). One bus and I was there.
Now this is my route
10/15min walk to turnpike lane (picadilly line) > change at finsbury park (Victoria line) > change at highbury and islington (London overground line) > change at west hamsted (jubilee line > change at Finchley road (metropolitan line) > commute comes to an end in uxbridge
So yeah....... Rather long
20mins for a 13 mile trip which is about 99% motorway. No way could I spend the same time as the OP commuting. Even if the salary was superb I just think I'd be so hacked off on losing out on family time/relaxation that I be constantly grouchy.