I think that because of my sins, my dua may not be getting accepted

Assalam-O-Alaikum Wrwb, I am a young Muslim man and I have found out that I have been "repenting and then repeating." By this, I mean I have been committing sin (I am abhorred to admit that I have watched some innapropiate things online) and then seeking forgiveness from My Lord, then for a while I stop that sin, but eventually I repeat the same sin. Often times I find myself depressed and extremely sad that I don't have the willpower to stop doing that sin and to stop lust, and I often think that because of my sinning, none of my dua have been accepted. This has been going on for around a year or possibly more. I've been making the same dua for that long time, but I've been sinning at the same time. Can somebody please give some guidance and help. Please make dua for my guidance, mercy from Allah (SWT,) the ability to stop watching, and for my dua to get accpeted. Jazakallah Khair.