To be fair it's easy enough to tell if you hate something like Vampire Survivors after 1 run. 40 minutes is also far and away more than enough to get a general impression of this game.
Like yeah you've "barely scratched the surface" at that point... if you're looking forward to seeing more. It's not some Final Fantasy "gets good 40 hours in" situation, nor are you going to see some new piece of equipment or character interaction that makes your impression of the core loop do a 180.
I'm waffling pretty hard on this game right now myself because I absolutely do not get what it is about it that has so many people hobbering over it in much the same way as I don't 'get' Balatro, but it's *almost* engaging enough for me to want to get as a phone timewaster for my breaks at work.
Though out of anything of the original post, if there are competing RLDB games available for free that'd be the more interesting part of the conversation to have.