I hate shitty ads as much as the next person, but you’re ignoring how much of the internet runs on advertising money. Think of all the websites, services, apps, etc that you use that are “free” (read: ad-supported) — without ad revenue, a large percentage of them would be too expensive to run.
I’m not saying ad-tech companies/people are always good, many of them clearly do unethical shit, but the idea that you’re being forced to see ads is kind of crazy. You always have the option to not use ad-supported stuff, it’s just a lot more limiting and expensive.