Rusty and worn out, unsteady and unsafe, uncomfortable seat and handlebars, unreliable brakes, hard to assemble, heavy and bulky, difficult to ride, boring and unappealing, poor quality materials, outdated design, difficult to maintain, overpriced, bad customer service, weak and flimsy construction, not suitable for different terrains, difficult to adjust, limited color and graphic options, cheap and unreliable parts, bad reviews, unattractive packaging, lack of safety features, unclear instructions.