Is it just my phone or is iOS 8 messing up iPhone 4S's?

Ever since I downloaded iOS 8, and even before, I've noticed my Facebook app crashing a lot on my iPhone 4S. But now I notice my screen freezes a lot and I can't scroll as fast as I used to on any app. The battery now lasts me only up to 4.5 hours when being used for a while. Another problem I have is album artwork not showing up for some of the songs I have on my phone. I've had this phone for 15 months now, use it heavily for web browsing, listening to music, social media, and texting, as well as occasional pictures and phone calls. I will often charge my phone when it is at as high as 50% when I might not be able to charge it later on, and I charge my phone twice a day. I also have 2.8 GB left of the 13GB available. Could any of this play a part in my phone not functioning well?

Added (1). Just so y'all know, I do turn my phone off completely once a day.

Well… For one charging you battery at 50% is very bad for the battery It will loose its charge very fast.
secondly if you don't occasionally fully shut down your phone it will get pretty messy like you described.
third only having 2.8 Gb might be the problem but i doubt it. If you don't delete old texts they accumulate in your RAM for some reason and bog down the system so do that. Its also an older phone running on a new OS witch might cause problems because the hard just wasn't built for it.

Ios 8 for sure…

It's both. Apple isn't the best company. They try to be though. It's kind of cute watching them attempting to be.

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