First question I will ask is which printer, which TPU filament and temperatures you are printing at?
Your prints appear to be under-extruded and suffers from layer adhesion. Try bumping up the extrusion multiplier in increments of 0.1.
You can print certain TPU designs on a bowden setup and my way to identify those prints are the ones where the layers keep stacking on top of each other with slight overhang.
Here are some of my junk prints and they were printed in the orientation they are currently placed:
In a nutshell: use 95A Shore hardness TPU, use dry TPU filament, ensure the 3d design is nice and smooth, ensure your retraction is dialed in, experiment with nozzle temperatures, ensure the flow rate via the extrusion multiplier and ensure extruder steps are dialed in, slow down the print for the first few layers, experiment with object orientation and placement to work around overhand and avoid supports, always use a brim for thin walled prints, ensure couplings/fittings between the extruder and hot end are nice and tight, ensure bowden tubes are not chewed off at the ends that are inserted in the press couplings as this causes excessive play and affects filament retraction.
All metal hot ends require 5-10 degrees centigrade extra (on my MicroSwiss hotend I am at 250 degrees).
Bowden requires around 6-8mm retraction with TPU.
A glass heated bed requires 5-10 degrees more temperature depending on the thickness of the glass. And its best preheat this to temperature so by the time the nozzle is at print temperature the bed is nice and warm. Clean glass beds with IPA and never touch it with your hands/fingers.