Tor project has many retorts but imo, the easiest way to improve it is just use it, even without donating. If literally everyone used it at all costs, websites would be forced to support traffic from it and blacklisting relays would kill the whole internet, e.g. $$$$. Without these issues, it would probably be much easier to host a relay, or even embed relay hosting in the browser by default. ISPs would be forced to open incoming ports, and firewalls would include it. Then it wouldn’t be slow or limited.