update: handed in a ticke for support with aditional info like the sys-log.txt, also tested again with the aditional mk7-wifi-adapter, switching interfaces, loging into the config AP and the PineAP , nothing changed - still on average only 10% speed compared to the original wifi-router speed (e.g. 15Mbs AP Down, <= 1Mbs WifiPineapple , mulitple tests with android phone -> WifiP)
Routing tables, forwarding all default and should look ok (in my humble experience) .... all in all if that is the performance of this product its very sad for me i saved my money
could have sticked with my raspberries ... decided that product for a stable captive-portal testrun/audit ...
i hope i can update here or get support with an permanent easy solution