Why is AVG installed without authorization?

General discussion
1 
In the last two weeks, installing other programs, I was offered to install AVG, I declined the installation, and then I checked that AVG had been installed. Isn't this the way malware or viruses work?
Why ask me if I want to install it, if then they ignore my decision as if it didn't matter?
They have lost my respect and I will never recommend installing them again - it was my primary advice among free antiviruses -
Awaiting your urgent responses...
3

Hello Hugo,
Thank you for contacting AVG Community Support.
We understand that AVG got auto installed on your device.
We are really sorry to know this. We'll certainly check and help you out.
We would like to inform that all our Applications are designed in such a way that it needs approval of the user to procced with the installation.
Could you please let us know which other program you installed and which AVG product got installed on your device?
It may also help us to diagnose the issue you are experiencing if you can attach a screenshot of the problem. If you are not sure how to make a screenshot on your device, please find instructions for a variety of devices here: https://support.avg.com/SupportArticleView?l=en&urlName=avg-create-screenshot&q=screenshot&supportType=home (https://support.avg.com/SupportArticleView?l=en&urlName=avg-create-screenshot&q=screenshot&supportType=home)
Awaiting for your response.

2

Hello Hugo,
Thank you for contacting AVG Community Support.
We understand that AVG got auto installed on your device.
We are really sorry to know this. We'll certainly check and help you out.
We would like to inform that all our Applications are designed in such a way that it needs approval of the user to procced with the installation.
Could you please let us know which other program you installed and which AVG product got installed on your device?
It may also help us to diagnose the issue you are experiencing if you can attach a screenshot of the problem. If you are not sure how to make a screenshot on your device, please find instructions for a variety of devices here: | AVG (https://support.avg.com/SupportArticleView?l=en&urlName=avg-create-screenshot&q=screenshot&supportType=home)
Awaiting for your response.