Try to use proper instances from projects like kavin.rocks, pussthecat, esmailelbob.xyz, bus-hit.me, vern.cc, tokhomi.xyz etc.
For eg., try https://nitter.kavin.rocks. It is one of the fastest instance and also hosts its CDN on Cloudflare.
e.g. I self-host the applications I rely on such as Teddit, Nitter, Bibliogram and Cloudtube and then use Wireguard to always remain connected to the network they are accessible on. I have also implemented identity-aware SSO[1] so I can expose those applications remotely to specific individuals.
Performance is better overall, but some things are still sluggish (teddit) because you're usually the only fetching data and nothing is cached.
Paired with Tailscale makes for a good combination too.
Until that is resolved, libreddit (similarly self-hostable) performs much better.
It depends - a lot of the privacy invasions go beyond just the IP address and also include browser fingerprints and on-page activity collected by malicious Javascript - these third-party frontends defeat that.