What are the disadvantages of Baidu app compared with uc and qq browsers? Why is it not developing well?

There is a saying that QQ has such a large user base that many people use QQ. UC is a very old browser, not to mention all the functions that Baidu APP has, and it is more connected. For example, Taobao interworking. QQ browser is endorsed by one billion users. Baidu has no users and has a mobile terminal in advance, so it is very passive now. Like today's headlines, it is difficult for Baidu to do information flow again.