"2 out of 10 trains per week were late or cancelled."
You were lucky. I used to commute from High Wycombe back when the Chiltern line used DMUs. As far as I could make out the outbound trains ran on no schedule, but depended on them finding enough working units to make a train. For fun they also tended to despatch a stopping service before an alleged non-stopping service. The tracks where the latter might pass a stopped train in stations such as Wembley had been taken up so no chance there. Mentioning Wembley reminds me that there were no extra trains for the extra crowds when there was an evening match.
Then there was the occasion when for some reason, one train came up behind another, somewhere like Penn and the two trains were coupled together to make one which was too long for the platforms. After a long while stationary at Wycombe those of us in the rear coaches eventually opened the doors and jumped out.
Being relocated to a location where commuting by car was a big relief.