Every Hosting provider have their downtime, troubles. If you find a Hosting Provider that doesn't have any downtime 100% uptime with ANY client
I will give you my apologies.
https://www.trustpilot.com/review/www.ovh.com
Look at those reviews, they have 70% of bad reviews!! 70%! But they still having a lot of clients new everyday!
Even OVH suffered a big fire in their Datacenters, that make a lot of customers with servers down for several days and hours! OVH is one of biggest Hosting providers in Europe.
People needs to understand, things is not like you see. Unlimited space doesn't exist for example, is just a marketing trick, but most of customers still believing that exists.
Even Google said will change unlimited to Limited, so what's the point here?
Alexhost had problems with DDoS Attacks, not with servers or Datacenter, that is a valid reason and is different that something you can fix in some couple of minutes or hours.
DDoS Attacks can't be easy solved in seconds or minutes, if attack is bigger you will be hard work to do, just make your research.
Research a little more, how DDoS Attacks are an headache for any Hosting Provider, ask them. Ask them about bigger attacks if is an headache or not.
That's what is. You should view the other side also. If you only see your side, you will judge without know.
I had problems with DDoS Attacks in my websites, is not easy to solution. I've need to switch to other provider and even with DDoS Protection, it can be offline sometimes.
DDoS Attacks is like a Whac-A-Mole game, won who have the best solution, but no one will guaraante that doesn't come other attack that will defeat you
Alexhost is decent Hosting provider, with LiteSpeed Hosting (currently using them, they are very good for Wordpress, very fast)
And also did you check the review of the user? He tried Alexhost, if is bad certainly he didn't posted that.
Another one, when you are happy with your ISP, do you call them to say "thank you, your services are great, amazing, I love it.. Good service" do you call your Internet provider? Hmmm I don't think so.
When we're happy, we don't care about giving positive feedback, but when we are angry or bad you will go say bad things about them like "they are bad blah blah blah"
Just my 2cents.