ok finally i found a workaround now to temporarily fix this slowness issue:
install cloudflare warp https://one.one.one.one/ and activate it. restart chromei compare the speed with and without cloudflare 1.1.1.1 wrap, its significantly improved the speed when cloudflare 1.1.1.1 wrap is activated.
i also contacted the support, it seems the problem is only specific for some Asian countries, not sure if this is the issue coming from fxdreema server provider or from their domain DNS.
hope that helps.