You sound a bit weary this time, not jet lag stuff. ,Maybe weary of travel and things not going as well as planned?.
Good observation. Yes, definitely and as I think you probably observed, a but grumpy towards the end and yes, very much less tolerant of things not going as they should, especially in the expensive places.
I had 2 x month+ long European trips this year in three months which I knew would be a strain and the second one was, but its just the way it panned out.
I've been trying to shorten my trips down to 3 weeks or less, but there's always so much to see! My next 2 trips are 2 weeks each, which should be better and maybe I'll be brighter
Summing up:
Spain - terribly hot, I loved Barcelona and enjoyed the mosque cathedral at Cordoba and the city in general. Spanish trains were good (Confort class).
I didn't enjoy the Scottish highlands as much as I thought I might. I love the lowlands; highlands were OK, but for some reason didn't resonate with me (my ancestors were low landers). The crowds may have played a part!! Harry Potter train was a major fail (diesel on the day, due to fire risk).
Greenland cruise - very good. Greenland is interesting - few land wildlife to be seen (hunting), its mainly a cultural experience. But lots of whales and its iceberg central. The
Ocean Albatros was a good cruise outfit. Not as polished as, say Ponant and fewer inclusions but the expedition crew were excellent. I'd recommend them. The wifi was poor, though. Get mobile data - coverage is remarkably widespread.
Copenhagen - bloody expensive!
Next trip - a December cruise from Bali through the eastern Indonesian archipelago to Irian Jaya and down to Cairns. Nothing else!