I battled this for years myself. TRT can alter neurotransmitter balance both in a positive and negative way. To echo some opinions on this thread, your testosterone dose is double what it should be. As Phil mentioned above, before trying anything else, try a single dose per week at 110 mg for a few weeks and monitor the changes between peak and trough.
It would also be a good idea to test DHT.
Wellbutrin is a great drug for some, but not for everyone. It mainly affects norepinephrine and not dopamine. It can increase anxiety in a lot of people. Anxiety is a libido and sexual function killer. Maybe that is why THC helps?
You didn't mention your age. That is an important factor.
IMHO... HCG is an absolute must for those on TRT.
The cure for me was selegiline. The dosage and frequency are based on age. There are other options as well.
If anxiety isn't a problem, try Yohimbine HCL. Just don't take it while also taking Wellbutrin!
Topical DHT applied to the penis or perinium works like magic. If you don't have a source for DHT, use T Gel.
This doesn't have to be a forever thing, but it will take some time and some experimentation to get you back in the saddle.