100% agreed, I can relate to this myself. Spent countless hours hunting for Shroomish, but didn't find a single one, and no longer felt the motivation to hunt for it.
I understand this MMO is suppose to be hardcore, and things are suppose to be a grind to get, but if it's to the point where you're spending 5+ hours finding a poke that may even be a completely useless one that's you can't use, then something is seriously wrong. At this point, there will be about 2% of of actual comp membership pokes in the game
More and more people will find about these ridiculous low spawn rates, and I'm sure more and more people will hesitate to buy membership. If you want business, then don't, as Vegeta said, charge 5k for 20 minutes in the safari and have the membership area incredibly hard to find even a single membership poke. By the time you actually find one, you could of almost certainly bought it off someone for cheaper, or moved onto something more efficient to do, like levelling up your pokes with the 50% EXP bonus with membership.
No disrespect to the staff, this is just me stating my views and opinions.