If you have a 0.4mm nozzle, try a layer height of 0.32mm so each properly bond to the layer beneath it.

Also, ABS typically needs to be printed around 220-235C to create a strong bond between the layers.

ABS is known to want to warp on big (tall) parts because it pulls or shrinks when it cools but it should be solvable for small parts.

I have the same problem , if you look your printer , when the extruder is going for the center of glass bed is when you see that has a bad filament like the last picture that your send us.

if you tried to adjust the z axis could you see that badder or a little better but always you can see it because the platform does not is perfectly parallel. If you have idea or can solve this problem please tell me what or how you?

Tried with the fan on or off. no difference. its PWM controlled.

The PLA i bought today and tested with works super good.
Printing with a very good result as standard with 60mm/s feed. Also tried it with 300% feedrate boost and 10% extra flowrate, works perfect!

edit:
the PLA i print at 200c and bed is at 70c.
First tested bed at 50c but object lost adhesion so cranked it up to 70 and now it sticks well on glass with no adition to it.

Filament already sucks heat from the hot end if you feed fast. Fans will only add to this issue if they are not controlled.

But then this may not be a the problem at all if the temp remains stable.

But its very correct as pointed out, the glass bed is not very flat. if i make the 4 corners good, the middle will be quite alot off. say more then 0.4!

but still i can print 1-20 layers perfect with very good adherance to the tale, its normaly layer 30+ that start to have problem with layers not sticking good to eachother.

My table is level within 0.02mm. Much better then it should need to be. The workbench before printing probes the table on 12 points I belive it is. To compensate for table not beeing perfect levled.

My 2 nozzles have cooling fan for fillament.
On top of that i have fan aimed down on the work area.
my squish you can see from the pictrure- i wirked alot with it, think its ok now. I have very good adherance to table

Your bed might be level but hat does not mean your gantry is level. So you have to adjust your bed so it matched the same nozzle distance in the middle and all four corners. Also not all in fact most beds are not perfectly flat either so that has to be taken into account.

My table is level within 0.02mm.

How do you know that?  I wouldn't trust the probe read out, there can be play in that too.  The picture shows the nozzle printing way too close to the bed on one side, thats why it looks like nothing is coming out.

My 2 nozzles have cooling fan for fillament.
On top of that i have fan aimed down on the work area.
my squish you can see from the pictrure- i wirked alot with it, think its ok now. I have very good adherance to table

Still have problem with layer separation tho, been printing with bed at 100c and extruder at 215c with cooling fan

Im going to try with the bed still at 100c and the extruder att 222c with no cooling fan, cant use cooling fan if one want more then 212c on the extruder........... It cools the extruder to much.

But before I try this id like some input on the Z offset. i did a z-offset calib, look at the picture and say witcho n ye think is best ?