The mail shield for example decides to take over all the certificates and blocks all of my mail
It doesn't take over certificates.
avast needs to use its own certificate in order to be able to scan mail from/to a account that is using SSL/TLS.
avast doesn't block mails if you have things setup correctly (both email client as well as avast mail shield)
Then the Avast popups (fixable) and the google chrome bundle (fixable) and the extensions that it at no point asks you if you want installed or not.
As has been explained numerous of times, the ads can be disabled in the paid versions.
If you don't want avast to install Chrome, just select not to install it.
If you don't want the extensions, simply uncheck them when installing.
Every single update you change it and either add new things which you jam down my throat without even asking
Ofcourse things change.
Changes are needed as malware changes.
Nothing is jammed trough your throat at all.
It is your own choice what to install or not.
And avast doesn't have to ask since you agreed to the EULA.
Also,PUP detection comes as off as some users want to install the application and they don't want their AV to complain.
No. PUP detection is off by default for legal reasons, not because of what users (don't) want.