Quite simply, Stan Kroenke installed a puppet board and then allowed Gazidis and Wenger free rein to fuck the club.
Once we started to 'visibly' decline & the fans voted with their feet, he had to get rid of Wenger. Then Gazidis left as he knew he was on his jacks as the new >

target for fan anger if things continued to slide.
Kroenke promoted VV for the business admin side, as it was a cheap & easy option. He then brought in Sanllehi to run the football side, who got in Edu as a buffer for Technical Director. They got in Emery, experienced & cheap, >

but they didn't realise how deep the rot had gone. So whilst there was an uplift, it was only temporary. He lost the players which caused performance & results to quickly fall apart. 1st in after Wenger, he soon lost the fans too & he was a dead man walking.
Other appointments: >

Per at Academy? Cheap & easy.
Freddie in temporary charge? Cheap & easy. He soon found out how tough the rebuild would be & the fans even began to question an "Invincible".
So new manager was needed.
Arteta? Cheap & easy. More time bought with fans due to his time at the club. >

Everything is a sticking plaster; quick fix, not much thought as to long term planning.
#WeCareDoYou starts to gain support from fans, so in comes £72m Pepe & suddenly it's "Don Raul" and "Be excited".
All of this overseen by Josh, another cheap & easy option for his dad.
A guy >

who knows fuck all about PL top level football & thinks they can just do the same shit they do in the US to keep it ticking along & the cash rolling in from TV, sponsorship & merchandising, without the need to seriously compete.

He's wrong & needs to be reminded that he's wrong.