I have purchased a fairly high potency seed But the result is zero

Did the plants grow ok like they normally do and they have buds like normally? What is the perfect environment you have said that your growing in? And how long veg time and flower times do you use?

You sure it wasn't a male plant in first place did you get big buds? Did you have fans filters and smscom controller and temperature at right settings and it's not easy to help you with no pictures of the plants or anything else if you want us to help you out make a dairy or pictures of your plants but saying that noone knows the answers is making u look stupid by asking questions about things that you sound like you ruined anyway by putting it in oven

i was impatient many times in my first grows, but if was always hitting, microwave, amplifier, oven - you name it maybe its cbd strain ????

I dried it in the oven and then smoked it, but still no results, I don't know what's wrong

It needs drying or at least a decarb, smoking just after cutting is like smoking moisture. Smoke (if it ever burns) and nothing else...the amount of heat you'll need to get it burning properly will destroy the thc anyway. Without that, heat will not activate the thc that you are looking for when you smoke. So hang the plant upside down, in a dark room with good airflow and low rh...wait for about 7 - 10 days depending when you live and check. If stems break with a snap sound, it should be dry enough to smoke. If you desperate, you can use the oven on very low heat and smoke when crispy but not recommended. You might get high but taste and smell not gonna be there. I would advise you to do some research on that before trying. And lastly, but most importantly, do some research on curing bruh. Drying is only the first step in getting the bud you want to get, then comes curing and your need for patience! But in the end, rewards are reaped. Best of luck

I am talking about the raw plant, when I cut the plant I smoked it immediately and I did not feel anything, it has no strength at all, the plant grew perfectly and I bought seeds from a well-known company

If it did absolutely nothing, the odds are it was actually CBD/hemp. Did you get it from something/somewhere else than directly from a reputable breeder company? If you know for sure the plant it came from, the odds are you got a combination of bad luck, bad grow and bad harvest process. If the plant wasn't healthy or it was dried/cured incorrectly for example dried too fast or much and/or exposure to light, it could've lost a lot of potency. Each plant also has different phenotypes with varying results, so if it for example was an auto it's possible the particular seed you had was a phenotype that was so ruderalis dominant or took after some cbd strain it was crossed with, that it barely produced thc. It could've also been a hermie or gotten otherwise pollinated, which reduces THC levels as well.