"A bit of planning" = six weeks ahead, pre-paid non-refundable room-only, and you may be ten miles away from where you wanted, especially in an area with few lodges and some are basically on motorway junctions with rubbish cycle access.
And some are more basic and tatty than many hostels, aren't they? I remember Alcester, Croydon and Stonehouse needing refurbishment, off the top of my head, and the last two weren't cheap! Bethnal Green was poor too, but that was more shambolic operation unprepared for the number of guests and it was RideLondon, so not typical.
We should unpick this. I have no particular affinity to
Travelodge but your post isn't entirely accurate. It appears you don't like Travelodge, that's fine. I'm not a great fan of the YHA, the last one I stayed in was Buttermere, my recollection is waking up very stiff and a poor shower along the corridor. This doesn't make it necessary for either of us to deliver this sort of sweeping, generalised criticism, something I've avoided doing.
"Six weeks ahead" - you can book Travelodge Chorley, local to me, 2½ miles off the Leeds Liverpool canal, a popular bikepacking route for this Sunday - £32.
"ten miles away" as a criticism presumes YHAs are on one's route. It's a bikepacking tour the route can be varied. I doubt many affordable B&Bs are necessarily on route.
There are 630+ Travelodges, 32 on motorway services, how many on junctions is probably impossible to determine.
I've never been to the ones you mention other than Bethnal Green, twice. It was OK, the staff very helpful and for a London based event reasonably priced.
Recently I stayed in Southwark, well refurbished, extremely helpful staff, very poor breakfast. Leeds Vicar Lane last Friday was very well refurbished, quiet and offered excellent breakfast. The staff were great, as check-in finished, the lady smiled and said "Enjoy Bob, I love him." I hadn't mentioned Dylan, she guessed.
Within every organisation there will be good and bad, writing off an entire group on the basis of some broad generalisations doesn't help people who might consider Travelodge as a possibility.