ok so the first problem with collections is that if u go to collection tab and u click X... it delates the object.
(not on video) if u click + to make new collection and u type name.. it dosn't show up in outliner.
(on video) if u select few object and press ctrl+g. it makes collection, u type name. but it dosn't show in outliner.. but it shows in collections menu.
u use function insert instanced collection it see the collection from ctrl+g.. and it works.. however.. now if u click X in collections menu, and u click it on collection group it delates object from sceen. however the object still is in instanced object... if u press X in in collections menu on ctrl+g collection. it delates object from both instance.. and viewport...
it is huge mess.. video shows this better.
Operating system: Intel® Core™ i5-3210M CPU @ 2.50GHz × 4
Graphics card: GeForce 610M/PCIe/SSE2
Broken: Blender 2.80 Beta