-The love thing was just a silly line, I take it it was more sentimental, not scientific, quantifiable because he had access to every single moment.
-It was orbiting Gargantua, it was eventually going to get sucked by it, it's not like it's gonna happen overnight, or even in centuries or millennia, what's the problem there?
-The 5D humans saved him, also, nobody knows what happens in a black hole, being turned into spaghetti and then into a diamond is just a theory, you can let this one pass.
-You can take time as the 4th dimension, but there's also the 4th dimension of space, above the 3rd, he can't interact in those moments directly because you can't perceive more than 3 dimensions, Murphy can't see anything above the 3rd dimension hence why the 4th dimension was represented as a tesseract, to interact with the 3D world from beyond or above it, which was genius, because the equivalent of a cube in 4 dimensions
is a tesseract, have you even seen a 4 or 5 dimensional hypercube? It's barely comprehensible. And yes, at that point there's no beginning and no end, everything is happening at the same time, remember Dr. Manhattan?
Those are not scientific plotholes, as everything there is based on purely theoretical stuff, it's the artistic interpretation of n-dimensional geometry and black holes, you can roll with it.
-By the time she's an adult, based on all the work by Mycocaine and then helped by the data Coop sent to her, what's the problem there? Is it not believable?
-Well, you can transmit a butt load of data with binary, it just takes a little longer but not really that much longer.
-He was ****ing crazy and unstable
-It is plot convenience, but it's also explainable, the stronger gravity is the slower the time passes for Coop and faster for Murph, he was right next to Gargantua.
-Here is where it comes to interpretation, Coop said the 5D guys can't directly affect stuff because they can't pinpoint exact moments, it's clear to me that no matter what humanity was saved, hence why there are 5D humans to begin with, which tells me there's no paradox, then 5D humans came back to save what was left of humanity back then, the people who stayed on Earth and died, and like I said, you can't perceive anything that's going on beyond our 3 dimensions, so they needed a 3D human to figure it out and send the info back.
I don't mean to sound like a pompous prick or one of those 12 year olds you mention
but I do love conceptual physics, science fantasy and all that crap, and I've never come with a single substantial Interstellar plot-hole, like a legit one, that makes the movie crumble, there are always nit picks, or things that conceptually people don't understand.
This movie has flaws, but it's mainly minor flaws in the execution of some scenes, nothing really plot breaking, and sure is sentimental as ****, I can understand if you don't like it cause of that, but it has a lot of merit for actually trying to be educational of concepts that are kinda hard to grasp, I thought it was mindblowing cause I love multiverse theories and considering they are on the verge of proving there are physical dimensions above the 3rd one, I'm not one to praise Nolan, but he showed he understood those concepts pretty well, like the wormhole to begin with, it was the 1st time someone didn't show a worm hole like a literal hole/gate, that shows how well Nolan grasped those concepts.