So why doesn't it affect any other crypto exchange and why Bybit only? Anyone from UK can help me understand this?
You don't have to be in the UK to get the needed information, once you are online, you might even have better info than those living there. However, I love your concern as the same regulation should have been meted out to all similar businesses in the UK, and the UK is not as dramatic as the US's SEC and regulator's palaver, so why would Bybit consider leaving, and also citing marketing?
Well, all these companies can't be trusted, not even the cited reasons might be the true reason at times, but there could be more to it. More regulation tends to tie their hands further and also exposes some bad deeds, which might be a reason for this.
Take for example, since we use the global branch of Bybit, my brother and I discovered months ago that the services offered to us are different despite being in the same country and fully completed our KYCs. For exchanging $70 BTC worth to USDT, we are being charged different rates to the point that his own was ridiculously low while I would have to part away with $2+ just for a $70 conversion. We could not believe it but it persisted.
Another one is the artificially made whipsaws on the chart that are non-existent elsewhere, but you can only know if you can compare charts with other Bybit users. They do this to scam people by routing them through different servers, and I'm not surprised since their CEO came from XM, a company that is also manipulative.