I know how you feel. I’ve been playing guitar for a long time, and I still feel like I suck. I think you always do, but the important thing is to have fun. As Tony said in that video, “it’s a process” You never reach the end of the road.
I can play most open chords, but I just can’t play full barre chords, no matter how hard I try, like you said it’s just “thudding”. So I just play the smallest art of a barre chord without the bar.
Also take your guitar to a luthier, at a good guitar shop to ask for a referral to one who can look over your guitar. You may just need a simple setup to fix the string height and maybe suggest thinner strings.
Have your guitar checked out, relax. keep working, have fun and you’ll get there.
Bob