Inconnunom
Explorer
I'm pretty sure we've all known a couple people who are just objectively bad players, and that has nothing to do with their playstyle...
We had a bad druid for about 10 sessions. I personally tried to help him but after session 3 I gave up, he just wasn't listening or didn't care or something. He argued that druid circle spells were abilities, didn't know what cantrips were (until session 7), didn't know he could shape shift (until session 5 but then forgot again), after he died he came back the next session and was going over his inventory and realized that he had forgotten that he had a shield the whole time....
He spent a couple hundred dollars on MtG cards but didn't personally own a book. (He played every day at the store) After that 10th session, the very inclusive DM took him aside and said "Dude it's totally cool if you want to keep playing.. but you need to either play with the basic free stuff or buy a book and learn some of the rules of the game and the classes that you would like to play". He left and just went back to playing magic.
Oh and he fudged die rolls and lied about how many spell slots he had several times... soooo yea I don't feel bad about him not being there.