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Overlapping

Overlapping is very bad because it shows that you want to cramp a lot of information into 1 small place which is bad because it will draw a lot of attention which if there is another element wanting its attention then it will be a bad experience for the user to try to understand how the website works.

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed at sodales ex. Vivamus vel neque maximus, convallis libero id, feugiat lectus. Integer mauris tellus, viverra non faucibus vulputate, vulputate vel augue. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin sodales velit et vehicula blandit. Vestibulum euismod ac eros vitae dapibus. Integer egestas tristique tellus non pulvinar. Fusce malesuada, turpis tempor interdum vestibulum, arcu nibh fermentum leo, at lobortis justo massa sed urna. Donec malesuada nulla placerat arcu rutrum, et ultrices purus blandit. Curabitur euismod dolor eget odio maximus suscipit. Suspendisse fringilla volutpat lacus at commodo. Suspendisse laoreet lorem at neque fermentum ornare. Proin consequat, nunc vel pretium malesuada, leo risus vestibulum erat, sed rutrum elit leo sed est. Integer enim nisl, commodo ut lectus eu, fermentum mollis lorem. Integer mattis sodales sem ac mattis. Sed ornare suscipit dolor id cursus. Phasellus at turpis nec metus ornare accumsan eu at mauris. Pellentesque eget purus molestie, commodo ipsum eget, cursus leo. Aliquam egestas turpis a dui scelerisque varius. Sed euismod, leo eu hendrerit euismod, turpis risus scelerisque risus, ac lobortis sapien ligula at urna. Nam ut interdum felis. Cras quis semper felis. Maecenas lectus tellus, lacinia in auctor at, accumsan posuere neque. In elit magna, mollis eleifend augue et, sagittis egestas purus. Donec sodales condimentum lacus sed pellentesque. Vestibulum eu lorem nec lorem feugiat consectetur. Cras fringilla porttitor justo.

Backgrounds

Backgrounds should not be a place of chaos and bad color schemes.(See Top Sections). Also, Backgrounds should not contain any repetitive pattern except if it suits the purpose of the website like checkered for cooking (like on an Apron) If it is very bright it will make the viewer confused where to click because the background wants all the attention when it is bright. And patterens are most of the time the worst when used wit bad colors down below is an example

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aliquam quis odio porta, fringilla elit eu, tempor nulla. Maecenas vel ligula et tellus varius posuere a nec arcu. Sed faucibus gravida malesuada. Vivamus blandit finibus dui, vitae molestie diam mollis in. Proin tincidunt interdum nibh sit amet tempor. Curabitur ut lectus risus. Nunc eu lorem sit amet felis ultrices egestas. Pellentesque ut varius quam, sed ultricies ex. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia curae; Duis consectetur, arcu vitae egestas rutrum, mi neque molestie sem, a ultrices urna ipsum eu mi. Morbi volutpat ipsum at blandit ullamcorper. Pellentesque lacinia massa sed mi ullamcorper dictum. Proin nec vestibulum ipsum. Sed condimentum arcu a gravida vestibulum. Integer ac ex nec ante semper tempor id non odio. Donec tempor non leo ac dapibus.

Borders

Border Could be something that adds to your website and its text, but at the same time if used badly could look bad. If any one of you plated with parameters border, you know that you can have different border styles and you can add colors to the border if you play even more, then you can notice that you can have for each side of teh bordder you can have a different color and a different style which will loo very bad. Also there is something called border radius which can make the border smooth but can look bad when each corner has a different value Take a look:

What makes a Bad Website?

Shouldn't