Sounds like you got super unlucky and have had a very different experience to me. I’ve had a pair of 10x50 Vortex Diamondbacks for 4/5 years that have been used in horrific conditions across Africa, two years in Australia’s Northern Territory, New Zealand and stalking in the UK. They got daily use, never leaving my person as I worked as a Field Guide so needed them for birding etc. They’re showing signs of wear but are fundamentally solid. The front rubber lens covers broke, largely due to being in the extremes of heat (35+ most days) in Australia and then returning to the UK winter. I contacted Vortex in the US and they instantly sent me out replacements from the US free of charge. Arrived 3 days later. OP - their warranty and customer service alone (in my experience) knock most other budget-mid range products out the park and the glass is pretty decent. My 10x50s are also really quite good in low light, granted most would complain about them being a bit bulky, but I’m not exactly frail myself!