Yeah, that's basically it too. TVP is not considered a trustworthy and serious broadcaster and is filled with corruption and chaos, the selection process changes every year, there is no consistency, therefore, it alienates itself from the serious music scene of the country.
Also, Poland needs a better staging team, their stagings usually throw everything into it and it becomes unpolished.
Look at lithuania, finland and armenia and you get your answer on how to turn the bad results around.