Heavy mountain bike

[Nicolene61]

I have a titan alpine mtb my first real mtb. This thing feels too sluggish and heavy so Im riding a matvel cadent. I would really like to do some events, not major as Im starting out but jo I dont want to struggle doing uphills and taking forever on that. Im doing strengthening exercises but feel like I get more speed and strength from the marvel. Thinking of trading up to an orbea or merida but scared Im wasting money as this bike has not done 1000km yet. 

[HdB]

The difference in weight is probably mostly due to the suspension fork on the Titan.

I'd say depending on the route, ride the bike you enjoy more, and use the Titan when needed.
Wait a bit to replace the bike, and use the time to research and make sure you get something that is a good upgrade.
Replacing a bike you don't enjoy isn't a waste of money, but replacing it with something that is only a modest improvement when you already have a bike you enjoy more, would be.

[JayLow]

My rule of thumb is that 1kg of bike weight is counteracted by only ~1% more power over most climbs, so spending tens of thousands of Ronds to drop a kg on the bike would be an inefficient way to get faster. If you struggle to handle the bike (loading, offloading, etc.) then by all means get something lighter, but in general, bike weight is not the primary determinant of whether you will struggle. Cardio fitness, gear ratio, and skill (handling) matter more than bike weight, especially if you're not in the 90th percentile of riders.

@HdB is right - get the bike that you will ride, and ride it. You get better at climbing by riding.