[Advice Needed] Web 2.0 Private Blog Network (PBN) - Still Worth It?

The content in one of my blog niches is highly educational, but there is almost few IN ARTICLE backlinks even for the Wikipedia pages. So, almost all the blogs in my niche is lacking quality backlinks.

But my competitors still manage to have manual backlinks from many different resources (I've checked using Ahrefs). So, my website is struggling to rank on Google. As per content quality, I'm in TOP 2-3, but most of my pages are in the second page.

I tried few methods,

Guest posting: I've contacted almost all the sites, related to my website. Only few have even replied to my email and some of them even ask for money for it. However, I wrote few guest posts. But I stopped doing it for two reasons. First is, since I need more than 10-20 backlinks per article, it seems like not enough. The second thing is, it's really exhausting for me to write guest posts.

Skyscraper Technique: This one seems better for me. But as I said earlier, when I looking at my competitors backlink profiles, those are not from good contents. Most of their backlinks are from sites, which seems to have spinned articles.

TLD PBN (Top-level domain Private Blog Network) Method: Building an unique blog network costs a lot, according to my calculations. Even if I made an one, all those blogs need to renew each year, and I need hosting for each of them. So, if I couldn't renew them, I'll loose many backlinks, and it can negatively affect my rankings in the future.

So, I decided to build a Web 2.0 Blog Network

Since it has NO renew fees, web 2.0 seems nice for my project. But when I searching on internet and on BHW, I couldn't find any trustworthy resources posted in 2021 that confirms it's effectiveness.

Is web 2.0 PBN still works in 2021? What are the SEO disadvantages compared to TLD PBNs?

What are the techniques you used to give some authority to web 2.0 network.

And, what are the other SEO techniques that I can used to build more backlinks.

Anybody?

It's YES and NO

No since the best way is building a TLD PBN, guest posting or buying links. If your competitors have TLD links, it'll be difficult for you to outrank them.

Yes, since it has an advantage. If the keyword have low competition, you will be able to rank it easily.

But. Beware.

Make it look like as genuine as possible. If Google find it out, your time will be a waste.

Definitely works but make sure to find expired web 2.0s with past links, very low spam score and Page Authority. They still work really well.