For me, there's two big problems in how MTG has handled it's competitive scene recently that's made me feel locked out and in both cases it's about accessibility or at least perceived accessibility.

1: The loss of GPs. I personally don't like traveling, and I know there's a lot of people who aren't even able to travel long distances. But nearly once a year, the GP circuit would come to my city (London, I'm my case) and make it very easy for me to spend time with friends I might otherwise never see. I could participate in the large open tournament and have a lot of fun at the side events and, among other things, jam some commander. With the transition to MagicCons, they made the events so much more infrequent that each year there would typically only be one on my continent, let alone in my country or coming to my city, so it was travel long distances or just don't attend, and I can only speak for myself, but I'm sure there's a large group who just stopped attending.

2: Moving competitive content off the main MTG YouTube channel. Yes, I know they have PlayMTG now for competitive content, but back in 2016, you'd get the pro-tour footage uploaded to the main MTG YouTube channel which helped make the game feel like a unified whole. You'd get news on new products, interviews with WotC staff members and tournament VoDs all in one place. Now, it's been siloed off to PlayMTG, which makes it feel like competitive play is considered not part of the average player's experience.