LG Optimus Lollipop upgrade totally hate it

[countryfilly]

I hate everything about this upgrade. My phone is sluggish, Ive totally lost the faster SMS options of more predictive choices when typing a text-also hate the one line box to type in, cant stand the cartoony ugly colored icons, the list is endless. Can I just do a factory reset on my phone and not use this piece of crap upgrade?