the game has a lot of settings, i know its a slough to read through but most of what ur complaining about is modifiable by the user. i rather like the complex item interaction system, sure there are some quirks that make the game frustrating at times, but there are ample difficulty adjustment settings and even a "change how long a day lasts" slider. if you're struggling to make ends meet i suggest turning the day speed down so that time passes more slowly. Personally i have mine set to 0.8, but it goes down to 0.5. It can be located in the popout menu to the right of the "load a save" ui when you click on your save slot. You can also disable falldamage, physics damage, server minigames you dont like, nightmares, bloodloss, coordinate radar fuse decay, drone tower fuse decay, and i think even transformer decay in this menu. the old controlls forced people to hold shift alt e and also scroll thru a menu at the same time, and that is rlly bad for people with coordination issues, and frankly, I think the game has become much more playable and accessible overall because of it. sure, a toggle to go back to the older system would be nice, but getting used to the new controls isn't that hard, and you can also change the timing of the hold action to make it faster and more fluid. I get that it can be confusing at times but the tutorial and the help and info menu explains almost everything if you just have the stamina to read it.
TL;DR
turn down your day speed so you have more time to get your stuff done so you don't need to optimize as much, and turn the game mechanics that bug you off. the controls being different, sucks I'm sure, but you have the capacity to learn and remember new ones, And once you nail them(and dial them in to your needs with the settings menu) they're pretty quick to use! also signal triangulation just looks cool, i think that's why it was implemented tbh, i like it, personally.
P.S. if you dont like repairing the ATV, just reset its position and stats, that puts it back in alpha base, and fully repairs and cleans it. you can access it by clicking on a saveslot of your choice and pressing the "open save data reset menu." there are also buttons for fully cleaning the base, change what day you're on, resetting the player's position and stats, and removing all your upgrades, so make sure you only have what you need selected. also its rlly easy to get infinite points and items in the story by putting stuff in the mailbox and loading backup saves. its handy for when you accidentally loose stuff or when you want to cheat :D (the mailbox is storage between save slots and its content is based on the most recent main save)
CHEAT SOLUTION FOR BEING TOO ANNOYED BY TRIANGLE!!!!!!!!!
STEP 1: DUPLICATE EXPENSIVE SMALL ITEMS!
STEP 2: SELLL THEM ALL AND BUY [ping cooldown upgrades] TO THE MAX! [also cursor speed so you can get to signals quickly]
step 3: teleport all coords to the signal thats green
p.p.s. i play with swap hold and press "r" actions turned off, its on by defaut for some reason