Why wifi not proper in work Fully speed

I don't understand please explain it

there are limits between the standard2.4ghz frequency 802.11 with is 1 to 2 megabits per second where the 5ghz frequency 80.11a has a speed of 1 to 54.2 megabits per second these too frequency's are similar and work on Aga sent frequency's that modulate with harmonics to connect to the modem with Bluetooth but we don't categorize Bluetooth as Wi-Fi Cuz its a frequency's so if Ur using anything with Bluetooth around it, it can disrupt slightly and slow the signal down Cuz it went from say 1mbps to half Cuz of a couple controller's i mean its rare but has happened anyways there are your limited by the hardware or bios Cuz it would problem be a significant amount of power drawn likely kill your phone in 20 mins or less at the exchange data rate of for 3gbps of speed and that's a large battery and would probly cook some parts in ur phone man just think we all could have 1980s dialup lol i dont miss those days