Yes, I never had issues with imgbb until recently and it's sporadic - I can open the post see the images and then I get a DM asking me to send them the pics because they cant see them. When clicking the photos they can take up to 5 mins to load (I have 7gb internet so not a speed issue) talkimg seems to do it too unless I use "medium"
This makes me think the forums may be the issue over all - perhaps due to the photos size. But I hate to have to open each image from my phone and reduce the size manually. So, I stopped using imgbb and will just use talkimg and use the medium mode.
When I said the issue is with the ISP, I didn't mean the internet connection speed.
The problem is something else. Even if your internet connection speed is fine, sometimes the images just won't load for you. Imgbb shows the photo does not exist when you visit the direct image link. I don't know what the problem is, but I am not alone who faced this problem. I remember once holydarkness said that he got similar issues, and he probably said ImgBB hates him. He suggested scam victims use talkimg instead.
Apart from Talkimg and Bitlist image hosting, we have another image hosting site, which is hostmeme.com; it was developed by Little Mouse. But not many people know about this. Probably because he didn't promoted it.