I don't believe I have an OCD but when it comes to screen savers I may be a tiny bit that way inclined.
I had a pixel 5 for a short while and to tell the truth about it the best thing was being able to purchase a product called,, align pro,( or something like that) for the phone. It is an incredibly simple device,a simple frame that fits over the phone and centres the tempered glass screen protector right smack dab in the middle of the phone. When done the screen protector would be perfectly centred and if you were careful with dust totally bubble free.
The bigger the phone the harder this feat usually is . I am curious if anyone has a tip to share in this endeavour?!?
PS I am in line for the zenfone Mini as soon as it's available in Australia,I am over these big screens,all I want out of a phone these days is android Auto and Miracast oh and the occasional phone call LoL