I2p states on there website that it has potentially serious weaknesses.

The only relevant pages I found are I2P's threat model and the comparison between I2P and TOR:

• https://geti2p.net/en/docs/how/threat-model
• https://geti2p.net/en/comparison/tor

Please cite your sources so everyone can understand the reasoning for your claims of I2P being weaker than TOR.

Oh, and A LOT of the attacks mentioned in the page on threat models is/was possible on TOR. The I2P project follows TOR carefully and implements some of their features/mitigations too.

If we're talking specifically about brute-force DDOS, BOTH TOR and I2P faced these issues. The good thing about I2P is that it is more decentralized than TOR which can sometimes make it easier to mitigate.

Your points about I2P's directory (not sure what you mean by DNS here) can be lumped together with your complaints about usability. This DOES NOT make TOR inherently more private, secure and anonymous than I2P, it just means that somebody on Windows can download the TBB and start browsing (in albeit a not-very-secure way). Unless you missed the news, I2P now has a slick Windows installer so people don't have to fiddle too much with it.

You're going to have to give me evidence for me to believe that using I2P makes a substantial dent in your available bandwidth. Yes you're a router in the network but it doesn't mean that you're passing through traffic at GB/s speeds.

i2p is somehow a replacement for Tor

I never said that. Again, I'm not comparing I2P and TOR based on their usability (which has changed in the recent years), I'm comparing them in terms of anonymity on the wider internet when browsing using either protocol. Both TOR and I2P are great projects, the problem is that TOR is significantly more centralized.

However, if you are in a critical situation use Tor not i2p as today it is the best for bypassing censorship while still trying to stay safe.

Cite your sources for this. This is mere conjecture unless you have proof of metadata leakage on I2P but not on TOR/actual people getting caught using I2P but being safe on TOR. I'm sure the I2P Devs would be very interested too. If you're in restrictive regimes like Iran and China where TOR/I2P traffic is flagged - use a bridge or a VPN disguised as HTTPS traffic and hope for the best (it's a perpetual cat and mouse game).

Again, please cite your sources when making claims about technical shortcomings of I2P