Buy your own damn newspaper/book/use your phone so you don't end up creepily leering over someone's shoulder.

Just a joke, calm down

Not if you're the type who has social anxieties, rather just get off the train and avoid more awkwardness then to continue sitting next to that person.

So your "that guy".....

not exactly... I don't openly say "hey I didn't finish that page." It's more like "hmmm I wonder if that articles any good" then maybe ask the person with the paper what they thought about it. not so awkward if you do it in the right tone

The tubes come every like 2-3 mins. I personally wouldn't have been that bothered but if OP was then that was honestly the easiest and least confrontational way to deal with it.

Oh. I didn't know that. I live in America but where I live personally we have trains that come every hour to to 2. And they don't stop at every stop. It depends on the train you get on to get on or off a specific stop. Thankfully I drive my own car so I never really have to worry about a train or a bus.

That's fine, just letting you know. :) We have normal trains as well that usually come every 15-30, I wouldn't advocate getting off them on a whim. But yeah, the tube is a lot quicker.

And telling somone to stop turning their paper because you weren't through reading is polite?

how is having your personal space not seen as rude, I would have made a remark to the guy about stop being slow or should I read a section with smaller words. that would be rude lol

This isn't about "growing a pair," this is about someone who, as far as OP knows, could have violent tendencies and might have lashed out. Given the man's reaction to OP flipping the page before he [the man, not OP] had finished reading it, violence doesn't seem to be too far a stretch. OP may have had a slightly dramatic reaction, but not without reason.

yeah, plenty of worse things, very few passengers, big creepy guy, op could have been beaten up. always best to hold your ground, you never know what people are capable of.