Remove anti-social playstyles to encourage positive play for all.
Over the past few years, there has been a very solid trend towards rewarding players for completely locking their opponents out of the game. Magic, which started as a fun, casually-competitive card game primarily based on creatures and other permanents, has instead veered more towards this overtly negative, anti-social behavior.
Counterspells and Milling, while certainly having history in Magic for the past 30 years, were properly relegated as one-off clutch cards or secondary effects. Similarly, "lock" cards - enchantments or other abilities that render permanents completely useless, have overly dominated play. Cards that force players to sacrifice unreasonable numbers of permanents - every single battle - are another example of this.
Havine one or two is completely fine. But with so many different card names that do the same thing, you've invited the worst types of people to play your game. Just like any other card game, it only works when two (or more) people are PLAYING it.
If this is a path you want to continue to go down, it's imperative that you start giving the ability to offset this behavior. For instance, the only remotely anti-milling card in recent history is Gaea's Blessing, but it's no longer available in Standard (and is exclusively green). Similarly, only two or three cards prevent the obscene numbers of +1/+1 counters I get in literally 50% of my games these days, and they're in Historic.
Just as you have multiple cards that permit these effects, you must also provide multiple permanents that ignore them. Focus should be on the battle portion of the game (it has an entire phase dedicated to it, after all). Start encouraging more fair and fun gameplay.
(And if this forum is any bit like Reddit, my point on toxicity will be proven in short order.)
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[Deleted User] commented
Good news, this is not like reddit and you won't be getting a lot of toxic people in here. Instead it's full of people who can't read instructions and ignore everyone else's posts. Just look at the massive number of posts complaining about the exact same problems in events or that Sparky doesn't work, rather than voting up the previous post and adding their story to it. Truthfully, this will probably just be ignored and not get anymore attention.