Reconciliation because everyone else also cheats?

This is a wild thing to be writing but I’m considering reconciling with my WW partner because it will be my fourth LTR that I will have ended because of partner infidelity otherwise. I am 35F and feel so worn down. I can’t face going back to the drawing board just to pour myself into another relationship and go through the turmoil of crushed expectations for a fifth time. I always thought not cheating and lying was my absolute minimum bar (aside from DV, addiction etc..) but now I’m like.. better the devil you know?
It was so hard to meet anyone I had any chemistry with and I was single and honestly quite lonely for so many years between leaving the one I thought was the love of my life 8 years ago, meeting someone new who I dated for almost a year six years later before his situationship/ girlfriend he had never ended things with messaged me, and now a partner I have been with for over a year who had an EA (at least) with a woman at work, too weak to do the work on our relationship while he enjoyed the attention in the office.

feeling very tired.