My friend, you probably don't know what mean to pass
due diligence with
high risk country passport
Nobody will believe you until to prove for them documents in style all they want. Don't even think to try fabricate that you can't prove with docs - you hesitate and they will throw you.
If you claim job income - they will ask for payslips for all years, tax
certificate for all years, they will calculate your spending's with all these years and will ask for bank statements for all this years. Ah, don't forget about sanctions. They will check your employer, and if it don't like for them (for example surname of some executive will be same to the surname of some sanctioned person) - you will be kicked
And only after all this things, if your bank accounts balance will exceed 300k you could continue. In other way - no no no. Even if you withdraw money from
bank account to paper
cash and then deposit again - compliance will not perceive this money. And I could say, that in country of OP residence not many people hold money in bank in such sum, they use paper cash.
Personally I got this situation with Cyprus few years ago. And I don't believe from that time situation became easier.
5-10 years ago, yes, it was much more simple. But not now.
West Europe is too much scare of money from east Europe, so it's a much more easy to reject to persona, that got some problems because of it.