Arrowhead has less than 100 employees. Helldivers 1 sold much, much less than 2. It has an all-time peak of 6,744 players, and that was seven years ago.
These were the conditions going in. I’m sure they’re trying to scale up and meet the insane demand for bug fixes and content, but that ain’t done in two months. In most respects this is a small developer who hasn’t planned for this kind of popularity.
Try to see it like a choose your own adventure instead of “gotta catch 'em all”. I find it helps to have a soft rule against savescumming for myself - if I make a mistake, my character made that. The only times I let myself reload is if the outcome of what I did was unclear, and went entirely against what I thought it would do.