But the linear corridor shooter mechanic of the sequels are not well receive either.
Pure ignorance. ME1 had just as many corridors. However, ME1 also had small boxed in areas that were all nearly identical that you were told to shoot around in. At least ME2 designed each area of the game to feel unique. Having several new areas of each hub world unlock during recruitment and loyalty missions was also well done. It was only poorly received by people too blind to see that "corridor shooting" had always been a part of ME's gameplay since the beginning, or people who disliked ME1's design as well.
I also laugh at the notion that being a corridor shooter is a bad thing, considering ME2's corridors had upgrades, guns, and resource crates that helped you with your mission, that were decently scattered throughout each mission compared to ME1 where 98% of loot crates carried useless garbage in them. It also meant that depending on the class you were playing, the recommended mission order would change as Engineers would want to do Garrus' mission early to get the tech damage upgrade, while Adepts would probably enjoy doing Jack's for the biotic upgrades. Which in turn affected which party members you had available for each mission, which meant different varieties of dialogue for each squadmate.
Being that the corridor shooting is part of the core gameplay of any ME game in reality, and that ME will always be regarded as one of the best series in gaming, and definitely either at the top or in the top 5 for best series of the last generation, I'd say that "poorly received" is reserved for the minority. Also ME3 wasn't poorly received because of its gameplay. It was the ending which then paved the way for nitpick after nitpick to keep the hate bandwagon alive. ME1 and ME2 had their own fair share of writing flubs, but notice how hardly anyone mentions them, because it had enough good things in the eyes of gamers to keep them satisfied. Mess up even a little bit with the ending of a beloved franchise though and you've set off a bomb of fan disdain.