Here is a tip for snipers who are first learning. If you've never picked up a charger before or have very little experience with them, I definitely recommend starting with a splat charger or splatterscope just to get a feel for them.
Yes, close combat can be tough for chargers, but it's definitely not impossible. Even with an e-liter, you could have as little as three swim speed subs in your gear thanks to the recent buff and it would do wonders for you when trying to maneuver through your ink. If an opponent is coming at you fast and you have little time to react, there's always good old ZR tapping. Three taps should do it for e-liters, I'm not sure if it takes the same amount of taps for splat chargers. But close combat with chargers doesn't always have to be ZR tapping either. Sometimes you can confuse your opponent by swimming around in your ink in an unexpected direction, and swimming just far enough away from them to charge up a shot and snipe them before they get too close.
Some abilities I'd recommend are swim speed up and ink recovery up, but ink saver is also a good one of course if you are not the best with ink consumption.
And for e-liters users with ink mines: Ink mines are very useful for preventing flanks. The point sensor in them can surprisingly be enough to drive a potential infiltrator away even if no one on your team is anywhere near that area of the map to stop them. It's not something that stops everyone, but it can help when you least expect it.