Question High end Rig running on low fps

May 26, 2020
First of all i am not tech spec. But I will try my best to describe my problem and hope for the best.
My problem is i am running low fps or lower fps than I should, because of my friends with similar rigs having much better performance.
It started after I decided to reinstall windows. ( I did it because I downloaded some app and it changed my Google chromes home page and I couldn't change it back).
After reinstalling windows I noticed that my fps dropped like 20-30%. I.E. Pubg was 100+ now 70-80 fps.
My rig specs were:
Intel Core: i7-7700k OEM
Kingston Value DDR4 2400Mhz 8gb 2x
Samsung SSD 256GB
Seagate Barracuda 1TB
Evga GeForce GTX 1070 8GB
Asus rog strix z270h Gaming
Cooler master hyper tx3i
Corsair cx750M, 750W psu

It were because I updated and I see no improvement.
New parts:
Samsung 970 Evo Plus SSd 1TB
Corsair Hydro H115i pro
Msi Geforce RTX 2080 Super Gaming x trio
Corsair vengeance RGB Pro DDR4 3600Mhz

I can provide any aditional information needed.
I changed my monitor also and running on higher res now, I know it doesn't help but still I should get more FPS than I do right ?
I am getting
Read dead redemption 60~
SnowRunner 70~
League of legends 150~
Escape from Tarkov 60-80~
Battlefield 5 100~
May 26, 2020
Yeah now its 1440p but I can change anytime back to 1080p and still get crappy fps on same games. Also worth mentioning that i am not playing on highest settings its normal or low. Except league of legends.