My problems with lenovo legion 7i

I bought lenovo legion 7i i9 14th gen a month ago, And I downloaded 2 gacha games, that's it. The problems I am facing are . Sometimes the browser becomes irresponsible, like if I click another tab it won't register the click. .random wake up time from sleep, sometimes it will take like 3-4 seconds, sometimes like 8-10 seconds. . And 2 times the screen glitched like this

I am sure this isn't normal right? What should I do.