MuddyOne I think I will change my approach and buy beans and stick to those that suit me,with some I had good results.
There are 3 distinctive issues here:
1) your machine is overheating (but you can just quick flush until this gets sorted). You need to contact the retailer for that, something we can’t help you with. I am unsure how you’ll measure the temperature of the coffee with a thermocouple and no other equipment meaningfully, but I’m sure @Adrianmsmith will help you here (I’m curious to know that one);
2) your puck is deteriorating halfway through, as per your video. I think your coffee is stale.there’s only one way to find out, already discussed.
3) you may not like the coffee from SquareMile, specially red brick. Personally, in my view, that is a great crowd pleaser. But taste is taste. And this is totally unrelated to the issues 1 and 2.