New player: How to deal with graveyard hate and how to punish landfall?

As a new edh player, I've noticed that there are some difficult ways to handle graveyards and landfall play styles.

For graveyard hate, the GY hate cards mana cost are typically between 0-3, and can be devastating to the graveyard player. There does not seem to be a solid way to protect the GY, other than returning the GY back to the deck, but again, that still is not good for the GY player. Some people say you should try not to over extend, but if you're trying to keep up with the pod and they exile the GY after turn 7, then the GY player is in a really bad spot. The way I see it, is if the GY player spends 20 mana on setting up the GY, then it doesn't seem right that a single 0-3 mana card can completely annihilate that strategy. The mana deficit there seems too high.

For landfall decks that spam out lands, how do you deal with this? It feels like this is a similar issue with GY hate cards, except rather than the issue being mana cost, it's just "destroys all lands" and not "destroy x lands". The majority of people don't want to see land destruction and will scoop immediately, but I think destroying land spam is justifiable. It just seems that there are not any good cards to slow down landfall players without ruining the game for everyone else.

What tips do you all have for handling these strategies?