There are not "high criteria" to immigrate to the UK post-Brexit. The minimum salary threshold is £26k, barely higher than minimum wage. The list of eligible occupations is a joke and includes such desperately understaffed occupations as "homeopaths" and "reiki healers". The skilled worker visa only requires B1 English, at which level you'll struggle to communicate in many professional settings. Net immigration (legal and illegal) exploded after Brexit and is still higher today than it was in 2016 when we had the vote.

You have no idea what you're talking about.