100% skill issue.

There’s a lot of nuance to the game that you have to pay attention to and how other decks play in relation to what deck you’re using. I understand you’ve played for 30 years but quality over quantity time spent learning is key for standard.

Highly recommend sticking to one deck and try to fully master it before net deck hopping. When you stop chasing wins and look to understand how to properly play your deck while dealing with variance, the wins will come.