It does come with a warranty you know.
Do a factory reset and if it is no better contact Nokia support.
I haven't had such issues.
Instead of complaining, maybe tell us what steps you tried to take to counter this issue.
Have you tried a factory reset? Are you running Nougat, Oreo or the Oreo 8.1 beta?
What kind of apps are you using? etcetcetc...