To sum up and clarify my thoughts, based on the video comments and feedback:
Bikes are made for (and should serve) the riders. Not the other way round.
For my own bikes, I care about safety and reliability a lot more than about the budget. Even in those terms, the modern stuff is way, way worse (I ride hard, a lot, and weak things break, despite the good maintenance).
Also, the simple "cheap" bikes ride wonderfully and if I hadn't ridden those over the past decades, I would probably have believed that disc brakes (and suspension) are a must.
Still, my main "gripe" is about the lack of choice, not about the new stuff in and of itself. Many people (including some good friends, good mechanics and good riders) are happy with 1x, hydraulics and electronic shifting. That's great. But that stuff has many cons, and I don't like the lack of choice to choose the simpler stuff.
It's great to have modern stuff as an option - if you need and like it. My rant is primarily about not having an alternative option - with rim brakes getting pushed out of the market (and disc brakes and suspension being pushed even to city/commuter bikes).
From a service point of view, my experience is that many more people have problems with disc brakes compared to rim brakes, and that it takes a lot longer to service disc brakes.This video is an example - I compare that (with the self-adjusting brakes) to just turning a preload screw on V-brakes:
Now, to consider those on a budget:
Cheap, poor quality suspension forks are a lot worse than rigid forks, for example. I recommend people either buy the decent ones, or no suspension at all. Unfortunately, most reasonably priced bikes come with low-quality disc brakes and suspension.
Could you build a bike from parts then? Well, for building bikes:
Most "normal, ordniary" people (i.e. not avid cyclists or mechanics) can't build bikes for themselves (and most shops can't do that for them except maybe during slow months).
So, when people ask me for bike buying advice, it's getting more and more difficult to recommend
bikes for commuting,
kids' bikes or bikes for short weekend joy rides - especially if they are on a low budget and looking for easy and cheap maintenance (most people in the world are even more poor than people in Serbia, and most people in Serbia earn about $500 per month or less - i.e. Serbs are rich, an cyclists in the US and most EU countries can consider themselves to be the super-rich minority, compared to most people in the world today).
If making money were my priority, I would welcome all the new patents - they make it more difficult for people (and other mechanics) to do stuff by themselves (requiring more knowledge and tools that aren't cheap in decent quality). But I value safety, reliability, and getting & keeping riders (myself included) on the road - and enjoying cycling, without worrying about sourcing parts, long waits for fixes etc.
Relja
P.S.
I should probably make a separate video to explain the problems with the modern cranks design.
P.P.S.
There were surprisingly many comments (I wasn't expecting many people to care about this), and they've been overwhelmingly positive (one would normally expect that the industry is selling stuff that people love and prefer, but this proves that many things are practically forced on "consumers" - hate that word).