Yea, i2p is slightly more involved than just starting up tor browser, but its not that bad. The real problem for this case is that it doesnt have exit nodes built into the protocol, so getting to the internet is a bit harder.
WIPocket
They often do. If they didnt, people wouldnt pay the ransom.
system
Im pretty sure that is just Google Maps. Mapy.cz still doesnt have dark UI afaik.
I recently migrated from Element to Element X with first the proxy and now simplified sliding sync, and it feels way faster. Imho Element X is still very alpha software, so I wouldnt recommend it to the general population just yet (and I still occasionally have to open the old Element), but the speed is really noticeable on even a very small instance.
Sliding sync was recently implemented in Synapse itself, so as long as your Synapse is up to date there shouldnt be any more setup on the matrix side. Try checking the Synapse logs for any issues and/or the cloudflare tunnel configuration (I have no idea about what it does to traffic).
Same. Imho it shouldnt even be possible to build this.
What overlay? That looks like Windows 7 with the Aero theme disabled to me.
Is it, really? It is Turing Complete, after all.
Yep, almost. Every* i2p node also acts as a relay, which not only helps the network, but also your anonymity, by drowning out your traffic. It however only does this inside the network, it doesnt work like an exit node.
By default, it does run a proxy, so that you can access i2p addresses using a browser set up to use it. It also lets you use the proxy to access the internet over i2p, but you have to choose an exit node manually (tho iirc there is one set up as default, which is fairly centralized, but still should be anonymous thanks for the rest of the network). A slight difference from Tor is also that these are protocol level proxies, so you will for example not be able to connect to a clearnet ssh server over these.
*https://geti2p.net/en/about/restrictive-countries