I can tell you some common worst experiences that people might have with toasters:
Toasting mishaps: Burnt or overly toasted bread that becomes inedible and fills the kitchen with a terrible burnt smell.
Electrical issues: A toaster malfunctioning or short-circuiting, leading to sparks or even a small electrical fire.
Stuck toast: Toast getting stuck in the toaster and being difficult to retrieve without risking burning fingers or using unsafe methods.
Uneven toasting: Toaster not evenly toasting the bread, resulting in one side being too dark while the other side remains barely toasted.
Sudden pop-up: Toasters with a strong pop-up mechanism that causes the toast to fly out and sometimes land on the floor or in awkward places.
Hard-to-clean crumbs: Difficulties in cleaning the crumb tray, leading to a messy and unsightly toaster.
Inadequate slots: Toaster slots not wide enough to fit certain types of bread or bagels, limiting its versatility.
Of course, these experiences may not apply to every toaster or individual, but they are some common issues people might encounter with these kitchen appliances.