[thunderstrike541]

The more accurate reason for the 8 years later card is this:

It is extremely likely that the director made a mistake. Similar mistakes have been made in the past ( Stan Lee's cameo in Guardians of the Galaxy Vol. 2 (set in 2014) where he mentions being a FedEx driver (which was in 2016). James Gunn came out and admitted that the line was a mistake. )

You have to look at the whole picture and not just one movie of the Cinematic Universe

The beginning of Iron Man 3 (confirmed by Kevin Feige to take place 6 months after The Avengers) starts off in 1999. In the movie Tony mentioned to a girl that he hooked up with back in 1999 that "There better not be a 12 year old kid waiting for me in the car." The woman goes on to say that the kid is 13. This puts Iron Man 3 NOT in 2009 but in 2012 (it is likely this woman had the kid prior, as Tony recalled that he met the woman on New Year's Eve 1999 and that being 12 years before. On top of that, it takes 9 months for a baby to develop in the womb). Simple math solves that one And we know that the movie takes place around Christmas time (the date is mentioned), putting Iron Man 3 in December 2012 and Avengers six months before in May or June 2012.

Nick Fury states in Avengers that the events of Thor takes place the year prior, placing it AND Iron Man 2, The Incredible Hulk, and the modern day events in Captain America: The First Avenger in May of 2011. The first Iron Man likely did not take place more than a year before that, as Vanko was shown to be nearly as, if not completely, as smart as Stark, able to build a miniaturized arc reactor and a custom suit. This easily places the events of the first Iron Man in late 2010.

This means that mistakes were made in both Civil War (Vision stating that Stark revealed his identity 8 years prior when it was closer to 5 1/2 to 6 years prior, although this was one line and someone forgot that Iron Man was retconned to being in 2010) AND Spider-Man Homecoming (the 8 years later bit, which would place Homecoming in 2020, placing it 4 years after Civil War, when it is supposed to take place a few months after).

As for Doctor Strange, the beginning takes place in early 2016, and Rhodey is not 35 years old, but is closer to 48 - 50 (his birthdate being listed as being in October 1968). While it is hard to find WHERE this birthdate is mentioned in canon, he is also a known member of the Avengers, signed the Sokovia Accords, and would not need the cover of "injured in a training accident" when he was in fact injured trying to bring in Captain America and his team. Even then, Civil War takes place in spring of 2016, while Doctor Strange is off trying to find a way to get healed or even (at that point) learning magic at Kamar-Taj.

Next time you try to say someone is wrong, do your research and look at the bigger picture instead of just one movie.