Internet is just today marketing and money.
Well, and a whole lot of useful stuff too. You can use maps to find out where you are, how to get where you want to go, what the house at your destination looks like, and how to get there most efficiently (avoiding traffic jams). You can even look up ahead of time where the traffic accidents are right now, and get amazing detail about them. You can use it to read and write mail much more easily than we used to. Remember, 30 years ago few people were able to get an e-mail address without spending significant $$$, and then reading/sending mail was quite difficult, it involved installing and configuring mail software. Today you create a free account, have a reasonable user interface, and you are on the road. You can use it to read an enormous amount for free information, ranging from books (Goethe, Shakespeare) to source code. You can get technical data for nearly everything; last night I was lookup up the sizes of steel I-beams (thinking about better retaining walls in our garden), and looking for cheap places to get aforementioned I-beams hot dip galvanized nearby. When I'm working, I listen to an enormous amount if interesting music. This afternoon, I heard about 10 different orchestras and bands play Leroy Anderson's "Christmas Festival": I'm going to be performing in it soon, so I wanted to hear how the best performers in the world play it. And so on and so forth.
Now, who pays for all of that? You don't, and I don't. It is the
fools companies that put ads on the the web sites.
It is not the same as original idea of the www.
Can you explain what the original idea of the www was? I don't think I can. And I've met and chatted briefly with TimBL (we worked in the same industry before he became famous), and I was actually part of the group that installed the very first web server outside of Switzerland (Paul Kunz did that work, may he rest in peace). I think our vision back then was to use the newfound connectivity (the term "internet" simply meant a network that connects other networks) to make more information accessible to people, and the web gave a better user interface than ftp and telnet. But I'm not sure I got that really right. Probably if you ask 10 people who were involved early on what the "original idea" was, you'll get 11 different answers.
Look android, there is almost a single app without ads

Luckily that it is on an opensource kernel, what's the point to bring ads everywhere when user need just to use a software.
Have you actually tried using Android to do something useful? I have. Downloaded the SDK, compiled it, and wrote a "hello world" app (it displayed a text string and a button, and shut down after you click on the button). Took me several days. Then I decided that writing mobile apps is not what I'm interested in, don't have enough patience.
You say "just use software". That's completely ridiculous. Not just technically wrong, also completely wrong-headed. Do you even begin to understand how much work it is to implement something like a mapping program, which allows you to find out where you are, how to get to where you want to be, what the area looks like, and what the various traffic jams along the route are doing? This is not "just software", it is a project that takes thousands or tens of thousands of people for multiple years. Just acquiring and curating the necessary map data is enormously hard, not even talking about the real-time traffic data. If you think software is so easy, then please design and verify the correctness of the algorithm to find the fastest path from point A to point B giving the road network and traffic information. Then you just need to do a little bit of typing code in, and pronto, you'll be able to navigate. Ha ha. Sorry, but your lack of understanding of the real world is not just a slight misunderstanding, but off by many orders of magnitude, and full of glib ideology. If you want maps, someone will pay for it, to the tune of dozens of million $. Since you won't pay, it will be ads.
Some parts of the web are still run by volunteers and donors. This web forum, and much of FreeBSD is an example for an ecosystem that is mostly ad-free. But every time you look on stackoverflow for the answer to a programming or system administration question, you are supporting the ad-based infrastructure. Who pays for stackoverflow? You don't, I don't, it is whoever puts ads there. We should be eternally grateful that those
fools companies are dumb enough to put ads there (which I never look at, I don't even know who advertises there, my brain no longer sees ads).
Now, I'm not claiming that the internet and the web is all good and perfect. There is much inefficiency and wasted effort. There are crooks, thieves, and scammers. I'm not sure whether Mark Zuckerberg is part of the "visionary and leader" side, or part of the "crook and scammer" side; and by that I don't just mean him personally, but his whole company, and the industry that acts as a reseller of privacy, making a small profit every time one user wants to penetrate the privacy of another user. The internet is also full of things that are dubious, although we have to admit that the boundaries are hard to draw, one person's art form or livelihood may be another person's embarrassing amusement (such as pornography), and a third person's smut that should be banned. All valid viewpoints, albeit contradictory. A full ethical assessment of the internet and web industry will have to wait a few generations, for the history books.