Is there anything in English similar to this Russian joke/proverb/or you could even say sarcasm:
"The hedgehogs got pricked, cried, but continued to eat the cactus".
It describes people who continue to do something less than optimal (even detrimental in terms of effort or/and money) when better alternatives readily exist.
I'm not sure the Russians made it up in the first place but it's extremely popular on the Internet.
The Russian saying implies there are several ways to achieve something yet people stick to something they learn first and then despite much better options being available they continue to stick to what worked and what they tried the first time. Hedgehogs eat the cactus and they actually get the necessary food and nutrients to survive yet despite better/safer food available in the wild they stick to the cactus.
You can also see "mice" being used instead of "hedgehogs".
Here it is as a Google search query.
And a possible trivia/history/explanation of its origin.