How you use it may be asymmetric but the actual connection being sold that way is garbage. I have 1200mbps down but only 35mbps up. If you’re downloading something over TCP(most stuff) then you need to send acknowledgment packets back to the server you’re downloading from. The faster you download the more upload you use as well. When your connection is as imbalanced as mine then almost any upload of even a moderate size is gonna make a huge dent in your download speed. I’m moving to a 3gbps symmetrical fiber line…
How you use it may be asymmetric but the actual connection being sold that way is garbage. I have 1200mbps down but only 35mbps up. If you’re downloading something over TCP(most stuff) then you need to send acknowledgment packets back to the server you’re downloading from. The faster you download the more upload you use as well. When your connection is as imbalanced as mine then almost any upload of even a moderate size is gonna make a huge dent in your download speed. I’m moving to a 3gbps symmetrical fiber line…
TCP ACK packages are tiny compared to the payload. I’m not sure this is really your issue.
Edit: To prove the point, this is me downloading a large file. The download to upload ratio is about 40:1.