Yeah 100% this. I want to watch Endeavour without ads, and I couldn't get some of it on Bittorrent (which is a first). It's available on ITVX for a subscription but there's literally nothing else I want to watch on there and I don't want to deal with cancellation & time pressure to watch it all.

I did consider buying a Blu-ray player and buying it on Blu-ray but it seems like they never actually released all the series on Blu-ray.

In the end I ended up figuring out how to download it without ads from ITVX. There's a tool which will bypass Widevine, download all the segments and splice them together without ads. Quite a pain to get working but still less annoying than yet another subscription. We already have Netflix, Disney, Prime, and a TV license.