after using blender, all outlets in kitchen stopped working and now devices connected to them flicker on and off
Ground-fault circuit interrupters (GFCI) can be triggered by a current pulse, e.g. that from starting (or shutting) an electric motor. This is normal behavior and does not necessarily mean that there is an issue with the motor.

Be sure to unplug any device with a motor or transformer (e.g. blender, food processor, radio or refrigerator) and then reset all GFCI's on the circuit, because if a device with high inductance is left plugged into the circuit, it may immediately re-trigger the GFCI again as soon as the reset button is pressed.

To reduce the nuisance of false GFCI triggering, a snubber or surge-protector may help prevent the inductive kick from a blender, food-processor or refrigerator motor from triggering the GFCI. Caveat emptor: success with snubbers and surge-protectors depends on the inductance of the motor, sensitivity of the GFCI and rate of current change (di/dt). Sometimes it's just easier to reset the GFCI.

For that reason, though GFCI's are required in wet locations, e.g. kitchens, it can be problematic for refrigerators. When the fridge compressor cycles on and off, the GFCI can trip, leaving food to spoil. In the US, the NEC allows installation of kitchen refrigerators on a separate circuit without GFCI in private dwellings.