Lots of hanging issues with my s21 plus. Why not after all samsung is known for hanging

1. If I'm in low temperature battery dies automatically. 2. My Front speaker is no working properly. It produces very rough sound.3. There is some problem in Charging jack fast Charging is not working.I can't expect these problems with flagship.I thi...

Whenever I play any game or continously use phone for half an hour it starts overheating and this problem is with every Samsung phone. Its Shameful if it's happening with flagship series.

S10 PLUS isn't working properly. AR Doodle isn't working. There are some hanging issue in gallery look at these pictures. It's a flagship phone. Come on Samsung Solve these problems...

Please solve this issue