I had a Titan angle grinder, actually I had two. First one broke, replacement broke. I then got a Makita and liked it so much I got a 2nd so I didn’t have to keep swapping discs/wire brushes. Screwfix are generally very good with warranties though so just make sure you use it well before the warranty runs out to show up any weaknesses.
My old large (like the Titan but from Aldi) eventually gave up after many years of abuse. I got a replacement armature and gear from Germany (freephone number on the side) for £18 which kept it going a bit longer but eventually the gearbox went. I only had a few minor jobs to do so picked up a £30 lighter use one from Lidl which has been pretty good. I have no doubt a Bosch or Makita would be ‘better’. But what I would say is if you don’t need a big one (ie just mainly drilling and light chiselling) then get one of the smaller ones.