Website design checking for flaws and review

Description

Design flaws such as poor scrolling, jittering of site elements, poor or no spacing, functionality errors, difficulty to use, struggling and poor user experience happen easily without you realizing it. Even the smallest flaws give the user an unprofessional impression, which has a strong effect on the decision, e.g. to buy something, to leave money on the website in general or it conveys to the user that he does not get what he is looking for or that the site is trying to persuade him.

This unprofessional impression creates the smallest intuitive feelings, which are enough to decide against the site or even to think that you are being scammed here.

I look for these flaws and also describe the impression the user has when he sees the site.

If it is in my tech stack, I can also fix it as additional services.