Here's the deal - you give me a list of plot holes from TLJ, and I can probably find a situation directly relating to it from the original trilogy.
~Finn mops the room on the Supremacy housing the hyperspace tracker, yet states "that's impossible" when the First Order successfully tracks the Resistance.
~Snoke throws Hux around like a ragdoll for losing the Resistance because: he's
unaware that there's a hyperspace tracker
on his ship??
~Luke goes to "the most unfindable place in the galaxy" yet there's a detailed map? Why?
~Holdo withholding the plan from Poe. Why?
~
"Failure the greatest teacher is." "Do or do not. There is no try."
~"If you choose to face Vader, you will do it alone. I cannot interfere."
~No explanation to how Maz Kanata finds Anakin's lightsaber or why it calls to Rey. And we'll never know because:
~Rey and Kylo destroy Anakin's lightsaber, but Kylo doesn't seem to recognize Luke using it later.
~Apparently TIE fighters are unable to outrun cruisers and Resistance bombers are constructed of papier mache.
Those are the biggest off the top of my head. I can probably find more, but I do need to get back to work...