I am sorry that you are frustrated. Being new to the hobby and being frustrated isn't much fun. Lead times are long (and possibly getting longer), but costs are holding steady (for now).
As a customer, I'm accepting the current situation. The lead times are clearly communicated and very reasonable, considering the circumstances. The "P" company that grades coins is at 30 working days of advertised lead time. That same company stopped accepting new sports cards for grading in that division because of the volume. That covers the top tier companies. The "I" and the "A" companies are the next level down. I'm not sure if they have extended lead times or not. They generally cost a little less, but are worth a little less in the holder, too. I did a lot of research (reading books, checking forums, youtube videos from coin dealers, etc.) before I chose NGC as my "grader of choice". In my criteria, lead times and price per coin were not high on the checklist, so they are the right choice for me.
My personal thoughts on NGC management is "good job!". They had an increase in volume and didn't "panic hire" a bunch of employees. That would not have been a good management decision. They also didn't price gouge. They could have easily raised grading prices to try and ease the flow of coins while increasing profit, but they chose not to.
Of course, right now many companies are struggling to fill vacancies across the spectrum of wages and salaries, so I can't fault NGC for that. In the U.S., we have had government "stimulus" payments, and that fueled a lot of new hobbyists. Coupled with the money saved during the lock-downs, I'm sure that there has been at least 6 months worth of discretionary income in a lot of homes that has been funneled to their hobbies. The company that I work for has seen a 20 percent increase in sales over the last 6 months, and we are having the same struggles with hiring people and not being able to meet demand. I would forecast that in the next 6 months, you'll see a gradual decline in lead times AND volume. As the world gets back to normal, coin hobbyists might find that they no longer have the time for coins that they did and the rat race will continue. Personally, I will continue to plod along, buying coins here and there, getting them graded, and smiling when I get a winner.