Ask Lemmy

First of all - don't overthink it! There are so many factors that play into this whole ordeal that a single person can't change. As other posters have said: Not all is bad. Always keep in mind that on the internet, these things seem to be much more dire than they are.

When it comes to the things I described in my post: Try to buy consciously. Assess if you really need the thing (example: If you alredy own a laptop and a smartphone - is there really a need for a tablet?). Try to buy things that last longer. Most products come in basically three price ranges: cheap, mid-price, overly priced. On most occasions it is sufficient to go with the mid-price range. This mostly offers the best price-performance-ratio. If you buy cheap you buy twice in the end (first for the cheap thing, then for the more expensive version that you should have bought to begin with). If you buy overly priced you probably are wasting money for a thing that could have been cheaper in the first place.

If you are not satisfied with digital services, then leave them for an alternative. For instance, I was unsatisfied with my bank. They tried to pull something off, thinking I will put up with it. I did some research and now I have changed my bank, even with better conditions than before. It was easier than I thought. The same goes with email providers or phone providers. If they enshittify their service for you, go to their competitor. Nowadays you can port your phone number with you. Companies are accounting for their users' laziness. That is why they can pull shit off in the first place.

When it comes to computers and operating systems, there is something you can do already: Go through all your settings and switch off all things you don't need (e.g. telemetry data, uninstall programs you do not use). If you don't know what a specific setting does or if it is needed, just look it up on the internet. Chances are great that at least one other person on this planet has the same question (that has been answered hopefully).
If your computer reaches its end-of-life, because the upcoming operating system is not compatible any longer, try to look out for an alternative. With a Linux-bases operating system, your old hardware might get some extra years to come. I think these have come a long way. 25 years ago I experienced myself with Linux, and it was awful! That might have changed now, and especially here on Lemmy there are many resources and users happy to help.

Try to use alternative programs, perferrably free- and open source. Or, alternatively, look out for programs that you can buy once and that do not operate as a subscription service. If you own a program legally (by having it bought once), it can't be taken away from you. When you subscribe to a program, companies always can take features away or make you pay more for them. This also applies for media as well.

With these things taken into consideration, you will feel less powerless and a bit more in control of things. And it probably will save you money in the long run.