My Huawei p9 lite is spinning around what to do?

I have been a Huawei p9 lite for almost 2 years and have been wrong about my phone for about 8 months. At first it crashed at 20% and later, it got higher and higher, so at 30%, 40% 50% … And now at 90% and I can't leave the house without a power bank. I'm afraid that I have viruses on it, but actually I have not downloaded anything on the Internet, only occasionally looked at bsto what, but that's why you get no virus. I also have normal device administrators. Before my phone crashes then my cellphone presses any buttons, wlan disables any apps or manages to post and send any messages (abshd something like that). I can no longer operate my phone, but if I press the power button and then turn my phone on again, it will work for a few seconds and then it will start again and then crash. After I charge my phone or just on the charger (so close to power), everything works again. I need help and conditional.

Battery spins around this is the electronics impaired? What I believe less, but could be yes.

Otherwise rewrite firmware or another

Thanks, I'll try that!