Back when I had heard that Microsoft had acquired Skype, I thought "Maybe they can use some of their money to make it better. I can always hope!"
Since then they had added bigger and bigger installations and added ads that ate up your bandwidth as well as your computer's resources. If you wanted to go back to versions that didn't have ads, you were left shorthanded a few months later when they forced them to stop working. By now people have a work around for the ads, but not everyone is tech savvy.
Also, with each installation, it ends up laaaagggginnng. If you don't have a semi-robust computer, then it takes forever to switch from one person to another and even load conversations. And don't mention the start up time on it. From the time I click on it to the time it actually starts takes 5 minutes, all of which it takes up about 86% of my resources to do that and I have a pretty decent laptop meant for gaming.
For android it's worse because the app is pretty hefty... A little too hefty for the kinds of services it provides. It takes forever to start up (seeing a pattern here?) and take forever to seamlessly go back and forth between conversations. If I go to another app and come back, it crashes and then I need to start it up again. It's an programming on it is terrible and should be rewritten.
To be honest, the only reason why I still use it is because all my friends and family use it, even thought they are as unhappy with it as I am. Still trying to find a good software for casual messaging.
All in all, Microsoft acquiring this relatively good application brought about its demise. I will only recommend using this if you cannot use another application to communicate.
By the way, I will recommend Discord for gaming. Uses less bandwidth and less resources to use.