Photoshop 21.2.1 - Unstable, slow and really really laggy

I have A LOT of problem with the 2019+ versions of photoshop but now im having a hell experience using photoshop. I saw a lot of people have being creating tickets just like mine and none of them have being solved so im going to be one more voice here. I need my software, paid software, to work properly. 

My user scenario and case: 
I have 2 computers where i use it, here is the configurations: 

1 - Windows 10 machine
i9 9900k + 32Gb DDR4 + 1.2Tb m2 ( 3000mbs ) + RTX2080 
2 - Macbook pro touchbar 

i7 2.7ghz + 16gb + 512GB - with discrete card 

Use scenarios - 

01 - Creating advertising campaigns keyvisuals and digital pieces. Never huge files for printing. Most files are around 2k ( 100dpi max ). My ipad pro can do this and right now my very expensive computer cant. 
02 - Creating interface layout for web

03 - Editing photos in native resolution (~20-30mb)- this may be the higher resolution i go usually

I have  the same problems on both machine, here are some indicators of how bad it is: 

1 - Zoom are very slow, the files size do not make any difference.

2 - Multiple files open makes the software unusable, basically

3 - If i try to use any kind of heavier brush, well... its not really possible. 

4 - Wacom? I will not even start, i quit using tablets and photoshop already. Right now i use ipad pro as a graphic tablet.

This is some cases i do have daily and im finding myself struggling to get work done. 

I have photoshop 10+ years and right now im using for photo retouch and a lot of interface and campaign creative work but nothing really crazy in size of format or amount of layers

I have followed every tutorial on how to improve performance and sincerly this is bizarre as i worked in a very slow computer on the older version of photosho and never had any problem at all. There is any way to get to what makes photosho not even usable on such hardware or can Adobe or someone point me what kind of hardware is now required to be able to use it ? 

I guess im going to spend a bizarre amount of money if i keep photoshop on my workflow. Im really thinking on leaving the plataform if i cant solve this shortly. I have work to do and this is keeping me slow, laggy and very frustrated for months now. Right now i think Adobe is not even trying as i can find pages of complain and no answer at all for this. 

So, im paying Adobe for so many years and using adobe software for so long that his is the most frustrating experience i ever had on software.