I can’t get my iPhone 6 to download the apps I want

I can’t get my phone to download the apps I want to play onto this phone spme apps from App Store won’t download cause says version is not supported and the apps that do download keep crashing plenty of memorie left I think it’s just more apple bullscrap so I would buy. A new phone and promise as long as I live I won’t ever buy another just because the game that apple plays by given problems to phones to not work properly worste investment anyone could make

[Re-Titled by Moderator]