I'd echo the "don't use your own device" advice. Assuming you're working for quite a small company: refuse to use your own machine. Make it clear that using it

I'd echo the "don't use your own device" advice. Assuming you're working for quite a small company: refuse to use your own machine. Make it clear that using it is not something you are comfortable with. Use the crappier machine but complain loudly every time you're suffering an issue with it. "Oh this runs out of memory when I try to do this", "this takes too long to load"... Etc. in your chats as it happens. Don't wait until a convenient meeting to talk about it either, post screenshots etc. In your chat if you can, get your team lead on a face to face chat or call to "help" you it. If you can get more senior eyes to see that it's a real problem for you then they're likely to push to get it fixed as well. Ultimately your success is their success, so use that. Nobody in their right mind will blame you if it really is a problem with your equipment.