How I see here is a lot of followers of Bitcoin SV. What is the main difference between BTC and Bitcoin SV? And Why now such a lot of exchenges delist BSV?
Bitcoin is bitcoin. It's the first and the most popular cryptocurrency in the world. BSV is a fork of a fork. It's a less popular version of an altcoin created by Roger Ver. It doesn't have much in common with the real bitcoin. This is the greatest difference between them.
BTC makes the network faster and cheaper by adding a network outside the chain. BCH wanted to make transactions cheaper by increasing block size. SV is doing a similar thing but increases the block size even more. Both BCH and BSV weren't popular for transactions even when BTC had no LN.