Hows an app can possible be this bad

Seriously, this reader app doesnt even allow me to select page and once again, this is a reader app for cry out loud; this apps Windows version allow you to search things but it can never direct you to this position. Seriously, how come any human being developed such horrible app. You can just develop a reader app better than this one by one afternoon and you dont even need any programming experiences to do so. I only use this app because one of my textbook can only be used on this app; but seriously, show some decency of humans civilization, such horrible app is disgraceful toward humans intelligence.

MrRabbit12345 about Bookshelf, v3.8.1