Neither are they doing good. Since fork time it's the top 100 coin that lost most % in price compared to all other coins, so not only due the BTC downtrend.
Not sure where you get top 100 coin lost most for monero? Any source?
As I can see, it is far far from that in a last 3 month (closest I can get to hard fork).
https://www.worldcoinindex.com/trending/overviewin another topic on another coin i made a calculation for comparison for the time period since the monero fork (see below). You can double check it of course and you will come to the same conclusion.
Period 07.03.2018 - 13.06.2018
Bitcoin: $10,428 $6579 = -37%
Volume: 8.3B - 4.7B = -43.37
Ethereum: $782 - $495 = -36.70%
Volume: 2.1B - 2.B = -4.76%
Zcash: $365 - $197 = -46%
Volume: 58M - 61M = +5.17%
Dash: $550 - $260 = -52%
Volume: 124M - 83.6M = -32.58%
Monero
Price: $344 - $125 = -64%
Volume: 154M - 40.5M = -73.70%