Q: Why am I forced to keep uodating my phone

I do not want to download more updates.  When I decline the update for 9.3.4, suddenly my wifi is almost non-existent.   It worked fine before I declind the update.  Have reset the wifi on my phone, turned the phone off etc, but it appears the only way to use wifi now is to update my phone. 

What is the point of buying Apple if our phones stop working when we refuse Apple access to our phone content?  Maybe it's time to go back to Blackberry.