Hi @Sitdowncupoftea
I am so sorry to hear you are suffering with your knee. There are a few different conditions that can cover off anterior knee pain ranging from Chondromalacia patellae (Runners knee), Patellofemoral Pain Syndrome and Patellar Tendinopathy which all have different nuances.
Part of the frustrations with COVID has been the switch to telephone consults as it is very difficult to diagnose these problems just via a phone call. Especially when there are some really good video softwares available. So it is no wonder you are feeling frustrated and disillusioned.
Strengthening and stretching is a good way forward for tackling the issue, however if you have the time / funds I would recommend a rehabilitation therapist consult (this could be a physio, chiro, osteo or graduate sports therapist). When you are selecting a suitable therapist please do look for one that will focus on return to function as opposed to a therapist that only provides symptom management via manual therapy (e.g. massage, mobilisations, manipulations etc).
You will benefit from a detailed diagnosis as well as a bespoke strengthening programme for you.
For the most part rehab therapists are allowed to see clients during lockdown for in person consults where pain / restriction to activities of daily living have been impacted. However we aren't far off lockdown being lifted (in England) so you could always book yourself in for a consult as soon as they open. Whilst virtual (zoom) consults can also work there are certain things that can only be effectively done for diagnostics in person.
Wishing you a speedy recovery,
Joanna