The Wire is probably the GOAT, but I can understand why some can call it overrated due to it's fans refusing to even acknowledge that it just might not be the greatest thing ever by a mile, for everyone. And it's easily TOP3 for me too, maybe even the best, but I can't say it's easily the best when there is Sopranos, and even Mad Men and Breaking Bad that are almost perfect too(maybe slightly in the tier below, but still almost equally great).
But Game of Thrones is easily the most overrated because at least 50% of it's fans are millenials who have never seen the likes of Sopranos, The Wire, etc., and are still convinced it's the best show ever.
Same goes dor Arrested Development - The Office, P&A, are easily better if anything for being equally funny - for six or seven fecking seasons, and yet Arrested development is always higher on the list from people that have seen them all, and it's what, 3 seasons of quality TV? Has anyone even watched the last two seasons?