I have a very small business and have no real money to spend on R&D.
So I've had a guy working here Mondays (realistically, just the afternoon) doing various stuff like server IT. He also has embedded experience, in areas which supplement mine.
3-4 years ago we decided to develop a new product, which has an ethernet interface. TCP/IP etc was well above my pay grade (which is mostly embedded/comms/control) plus I had not done any C for about 10 years. So he started on it, Monday afternoons. Started with one ST dev kit, and after a year I did the PCB, which worked 1st time. Another year later I realised progress was minimal and it would take another 10 years, perhaps 100 years, to get anywhere (obviously, half a day a week means you forget much of what you did a week before) so I got stuck in, went up the steep learning curve, and have done most of what needs to be done. Crucially I know what I have done, and it is all 100% solid code (solid except for the simple http server used for config

).
I quickly learnt that you end up working alone.
No support from ST (32F417). They have a forum which is full of desperate people, no ST presence (they are only a €14BN company, so they can't afford to support their products) and virtually no useful replies from anybody. Just one guy occassionally posts good stuff but only after he's told you that you are a complete moron. They do loads of videos which are barely legible (very poor English).
No support on LWIP. There is a mailing list which is dead. Vast amounts of bogus info posted everywhere.
No support on MbedTLS. There is a mailing list which is dead.
No support on FreeRTOS. There is a mailing list which is dead. Fortunately FR runs well.
No support on FatFS. There is a mailing list which is dead. Fortunately FF runs well.
There are also some forums for above (which are also dead).
Then there are many clickbait sites which copy stuff from other sites, in bulk, to get google hits.
93.7% of the internet

is desperate people asking questions on the above and getting no answers, and sometimes getting duff answers. Then there is Github (almost everything gets lifted off Github, which you discover by googling on source code comments), and probably a similar % gets lifted from linux sourcecode if your target is 80x86.
There are some more general forums (notably this one) where you do get useful replies - if you pick the topic carefully.
The Monday guy spent literally years (of Monday afternoons) trawling the internet for bug fixes and patches for the above stuff. He won't post questions anywhere, which makes it a lot harder. But now his part is nearly finished. We have a good running board. We are tidying up the loose ends.
I have learnt a lot and now know how most of it hangs together. In 1-2 years I learnt basic C (still don't get pointers to pointers), LWIP, FreeRTOS, FatFS. A lot of 32F417 bare-metal. But it's been extremely stressful. Nobody to even ask about some bit of C syntax (except on Mondays).
And it is clear that there are many others in my position, trying to get info and eventually, after an absolutely vast amount of googling, eventually finding some tiny snippet of info which happens to solve their problem. Then onto the next problem, and more absolutely vast amount of googling. A few hours later, that bit is running.
How do other people manage?
If you are hourly paid then you don't need to care. Another 1000 page RM = bread on the table at home for another year. What is not to like? The company doesn't matter.
I have looked for people who can do specific portions on the product and found two. Both got boards sent and the Cube dev kit so they could develop properly. One worked out well and did two modules, fixed price. The 2nd I had to stop after he ran up a vast number of hours and went off on a complete tangent (I should have done that fixed price too but for some reason didn't). I paid him but cancelled a part of the project which he was going to do also (involving a server on the web, which he does a lot of). A 3rd chap, fixed price, wrote some code which due to me not doing a precise enough spec he wrote for one of the ST dev kits and I could not run any of it, but I was able to use some of the code. But I have been totally unsuccessful in finding anybody who can do the ETH end (ST ETH, LWIP, MbedTLS). I need someone who really understands that pipeline who can go over all the code, apply latest patches, etc. and be around long-term, and be generally contactable on days other than Mondays. Probably, there is nobody. Obviously only really good people want to work fixed-price

It's a really inefficient way to work.
And it was never like this in the past, when chips were simpler. I developed literally hundreds of products over 40 years, all working alone. Just did it from data books. No internet.
The problem is the new functionality. It is so massively more complex.