Is anyone else having issues with the new iOS update for iPhones?

I only sporadically had wifi problems with my iPhone 4s before the last update. Now, my phone is acting berzerk. I've only dropped it a few times with an Otterbox Defender on in the 1.5 years that I've had it and it has never been water damaged. The screen is not cracked and works fine with the exception of slightly off-center calibration. So, I'm pretty sure it's not the hardware.

Ever since the update, my wifi either won't toggle to allow me to turn it on, freezes when I click on wifi in the setting menu, or turns on but doesn't search or connect to any networks. Sometimes it just crashes and restarts itself on it's own--occasionally twice on it's own before it actually turns on. The settings menu crashes and freezes often. I backed up and restored my phone (losing all my contacts and calendar events in the process because iCloud and the default back up programs on my computer won't respond) and the problem was only fixed for like 10 minutes before my phone started acting up again. The wifi will go from working to not working for a day or two. Then, it works for a couple hours, then the entire settings menu crashes if I try to fix it. Seriously, every single update either has no impact or makes my phone worse. Is this happening to anyone else's iPhone? I can't wait to get a new phone.