I never connect 'negativity' with criticism or 'positivity' with praise. Yes, pessimists can generally be pissed off about everything, while optimists tend to generate praise all the time. I don't think it depends on your world view though. A pessimist is a well-informed optimist anyway. So I don't give a chance for a mistake to sneak in only because it's small and I call out mistakes if I see them. I also love it when my work is criticised, it's far more useful for improving than praise. I see no purpose of praise in discussions in particular as if something's great, it's kinda obvious... (And the discussion is just full of "Thumbs up!", "Great!", "Fantastic!" messages)
So when I see a piece of work, unless it's a renowned masterpiece (even if it is, so what? It doesn't mean it's perfect) or a famous person's quote, I wonder how you can do it better. If the answer is "You absolutely can't", well, my congratulations then, you have achieved perfection. But usually, and I always validate it by asking various people or analysing discussions, flaws are inevitable. It's just sometimes they outshine the thing in question, and sometimes doesn't. The comments section is THE BEST part about social media, and often they are more interesting than the post itself. Gotta LOVE commentators with valuable input, negative or not.
Can't use Mark's music? Well, how about no music at all then? Rick Beato's Abbey Road Tour is a good example of how to do a studio tour: